Comments: Have a working tru temp for the last year in my tank now. Love it so much I bought the second for an emergency back-up...You just never know when and why you might need it...

Comments: This heater looks very well made the only thing is that it is a bit bigger than what I was expecting..

Comments: Yes it comes with an adjustable calibration dial. This is a great idea. However, when you have 8 degrees of play in the dial to set the temp, that just doesn't matter. For instance, I wanted my tank at 86 to get rid of ich. I set it there and the temp went to 87. I tried to lower the dial until the heater light went off and I had to take it down to 78.
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<br />Dial is hard to turn while in the tank as well. Not much for the other hand to grab onto for leverage.
<br />
<br />If however you just need a heater to put yourself in a temperature range and not have a exact temp, then this will do the job.
<br />
<br />For a tad more you might could find a digital one.

Comments: I've only used this for two weeks but it seems to be very well constructed and it was well recommended - I'm very happy with it.

Comments: Ive only had this heater for about a week now, but so far I have no complaints. It seems to be working well and holding a steady,and fairly accurate temp. My only complaint is that the heater is a little tall for my tank. I know that's my fault for not paying attention to the specs. Other than that, I've had no issues.

Comments: Great heater, easy to adjust setting, checked the water temp with two different temp guns, temp was right on. Very happy with this product!!

Comments: I'm currently experimenting with my third 'tru-temp' heater after the first two overheated my tank. The calibration dial does not at all reflect what the water will be heated to. Example: actual water temperature is 81.4F. Heater dial set at 77F and still heating! It continues to heat to over 83F! Cannot get pilot light shut off or product to stop heating even when dial is set to the absolute minimum temp. It's maddening! On the plus side, this product will heat your tank!

Comments: This heater is working out great would def recommend

Comments: Only been using this heater for a few weeks now, so I can't comment on the lifespan of the heater, but so far it has kept my temp at a steady 79 degrees and appears to be very well made.

Comments: Overall, Awesome. Temp gauge is a little tricky trying to get it to a specific temp.

Comments: Quality and Performance seem top notch. Adjusting temperature setting could be a little easier I believe.

Comments: Heats up quick when using for water changes =). I will buy another one soon when I upgrade to a bigger tank.

Comments: very good for the price

Comments: A little tough to calibrate, but once dialed in, it is solid.

Comments: I had a Visi-Therm heater for 15 years and needed to replace it because I felt my fish and corals were living on borrowed time. I looked at the reviews and decided on not getting another Visi-Threm so I went with Jager. I've had it for a few weeks and it keeps the temperature stable. It's dialed in at 77 degrees and my tank is 79 degrees so it more accerate then the Visi-Therm ever was even when it was new.

Comments: Bought this heater from MD 9 mos. ago and it has performed flawlessly. Set the temp. and then check the tank temp. and it's done. Set it, forget it.

Comments: Seems to be made very well. I use this in my sump and it's kept a perfect 79 degrees the entire time. FYI its in a saltwater setup and so far I haven't had any problems.

Comments: I like this heater and use it in my 24 gallon nano. It works well but does need to be calibrated more than I would like. Overall though, I would recommend it.

Comments: Perfect heater. No problems and has been running for about a year now.

Comments: Great product! Did exactley what I wanted it to do!

Comments: we are using this in casue our other one stops working but a great heater, and excellent site great prices and excellent service.

Comments: I have only owned this particular heater for a few weeks, but so far it is on the money and I am very pleased. I hope that over time it stays this accurate for my reef. I have tried many other brands, and they all over time lose their accuracy and either stay on for way too long, or turn off way to early.

Comments: Great heater, at a great price. Just set it, and forget it. It keeps large tanks at an even temp easily.

Comments: Well made, simple to use, highly reliable and accurate!

Comments: This is the best water heater you can possibly buy... Once calibrated, it will maintain that temp accurately all day. Not only that, it is submersible. If you have delicate fish, you need this.

Comments: Delivered quickly and works as described.

Comments: I kept turning the dial down, but the temperature in the tank remained the same. It took a lot of tweaking to get it set, and it's not easy to feel it out...

Comments: much lower price than my LFS and this is a good, quality heater. A good buy.

Comments: I bought to of these heaters for my 90gallon reef. I was tired of brand X always failing me. And since I purchased the Eheim Jager TruTemp. I have not had any problems.

Comments: I already have one of these heater and I am very pleased with it. It lasts and lasts and stays true.

Comments: The Eheim Jager heater is another example of the high quality and high value products that that company produces. Excellent product. Very accurate temperature control, and you can generally expect a longterm use of their gear.
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<br />They are usually a bit more expensive, but always worth every penny.
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<br />My heater arrived promptly and installed quickly. No problems -perfect operation. In use on a 30 gallon planted freshwater tank.

Comments: Overall is good no issues.

Comments: Been using these heaters for years (freshwater planted tanks). Quality built, exceptional longevity and consistent performance. You wont be disappointed.

Comments: Great heater. The dials are a bit confusing at first but they're highly, highly accurate. As a fair warning, it's flippin' huge. The length that's listed here and on the box isn't entirely accurate though. The THICK power cord sits right on top and is nearly impossible to bend, so make sure you have space for another inch or two to the overall length.

Comments: Real pleased with the Ehiem heater. Seems to be dead-on consistent.

Comments: I owned one of these heaters some time ago and was very happy with its performance, I bought a new one for my 135 gal. saltwater tank and am very satisfied. I very much like the quality of this product.

Comments: I have only had it installed for a day but the build quality far exceeds most of the heaters I have used in the past. My tank has stayed a very steady 77 degrees.

Comments: This is a well made aquarium heater, very accurate & easy to set, I trust the jagr to keep my reef tank within + or - 1 degree

Comments: I HEAR GREAT THINGS ABOUT JAGER BRAND,THIS HEATER IS A GREAT PRICE AND IS DOING VERY FIND JOB IN MY 265 GAL TANK. I USE 4 UNITS.I HIGHLY RECOMMENDED THEM,THE STAFF AT THE WEBSITE FOR A FIRST TIME BUYER ARE SUPER PEOPLE, 49 YRS IN THIS HOBBY

Comments: My first Jager Heater and it is excellent, have had only 5 days, it keeps temp exactly at 80 degrees. After you get it calibrated properly, it is flawless, no problems or temp fluctuations as of yet. Recommended

Comments: Realizing the Eheim Jager is not the least expensive heater, even with the website's excellent pricing... it is far superior to anything you compare it to. The protective glass casing is fully twice as thick as competitors and the ease of operation is unsurpassed. All controls are made for top down viewing and adjustment, allowing independant movements for both the scale and the setting. So, if your scale happens to be off a smidge from what it should be, you can index it to be spot on. I purchase heaters one size larger than what I need so it operates well within designed limits, which also allows for quick responce during water changes minimizing temperature change for your fish. Excellent price, quality product, quick shipping... there is no reason to ignore this website!

Comments: Quality of this heater alone would give it 5 stars it has a very durable glass shell, a really nice UL approved plug in and the thermostat seems to turn on as soon as the temp drops less than a degree. One down side of the actually heater is it is enormous for the amount of watts it puts out.
<br />HOWEVER, the performance of it was out right disapointing. This was used to heat a ten gallon nano tank in a chilly basement with an average ambient temp of 68 degrees. They say 50w to raise 9 degrees and 75w to raise 18 degrees. The 100w was on sale and I figure this should have no troubling heating the tank up. Plug it before calbriating raise the tank to 70 when set to 80. then i tried calbriating it and moved the ring as far as it could go. Set to 80 again got it to 74 degrees... Im hoping mine was just defective because that is terrible to have a heater's thermostat that off

Comments: I have been using the Jager Heater line for over 20 yrs. and it has held up to the times. Remember, it has a glass shield which holds the heat well so keep them submersed when performing cleanings.

Comments: Easy to set up and calibrates accurately within 24 hours after installation.

Comments: I purchased these heaters as replacements for another brand that was recalled. Jager has a long-time reputation for dependable heaters. Don't try to save a couple bucks when it comes to heaters, since a defective one can over heat a tank, fail to heat, or potentially start a fire (the reason for the other brand being recalled).

Comments: Bought this for my 6 gallon JBJ Nanocube. Fits perfectly in the back, almost totally submerged, but might have to modify the hole the cable runs through. Currently, the cable is being slightly pinched when you close the lid or if not lined up properly the lid won't completely close....just a slight gap.

Comments: I have had cheap heaters and expensive heaters i just set up a 90 gallon reef tank and bought this heater and I have jbj 200 dollar heater on all of my other tank this is by far the easiest on to set temperature on. It's that best heater I have own!!! Buy it you won't be let down for the price it's amazing!!

Comments: heater is great, fast shipping thanks very much....

Comments: Have tried many different heaters lately, some only lasting a couple months(marineland)which adds up quick at 50 bucks a piece at my LFS,so after reading many reviews decided to try Jager. So far so good on my main display tank, so decided to buy a couple more for spares, my quarantine tank and make up water. Seems to be a decent heater, performs well and isn't over priced.

Comments: I've had an old ebo jager 100w heater still going strong after 15+ years and needed a new one for my future tank upgrade. The new 150w Jager is staying within one degree of the setting and is working great! Hopefully, it will prove to be just as reliable as my older one.

Comments: Very well made heater, durable and a very small window for on/off. Some heaters will go way over the set point before turning off and way under before coming back on which creates a constant up and down in temps. This heater keeps temps very stable. For the cost i don't think there is a better option.

Comments: I have had the heater for a week now. Does a fantastic job of maintaining the water temp in the tank. I would definitely recommend this item to a friend!

Comments: An excellent heater. Provided unswerving service for five years until the thermostat began to fail.
<br />Now I am in the market for a new heater and I am going to purchase an Eheim/ebo jagar heater again!

Comments: I have been buying This brand heaters since I got my turtle in 2000. I have bought 3 so the life is decent. My turtle bangs against it all day and night and have had no breaks. This is a good buy.

Comments: I have been using jager heaters for all of my tanks and have never had a failure. I check and recalibrate if needed when new.

Comments: This heater is like a well trained K-9. It'll do what you want it to do.
<br />I got the 200W Jager heater for my 50G cube/30G sump, and it has been stable at the same temp for the past 5 days since I've had it.

Comments: Keeps my tank within 2 degrees of the set temperature.

Comments: This is the only product I would ever want to use in my tank. It is well worth the wait if out of stock.

Comments: I use 2 of these for my 38G tank and they seem to do the job very well. My reason for 1 less star is that they seem a little big compared to other heaters that deliver the same watts.

Comments: I've tried three heaters brands and the Jager is easily the best one. It's precise, regularly maintaining temperature within 0.5°F most of the time while other heaters were within 1-2°F. It's also accurate, especially with it's nice calibration feature. The only negative is that it's rather large at 9" for 50w, which can be an issue in some nano tanks; it almost didn't fit in my DIY refugium. All-and-all, an excellent heater.

Comments: Works very good needed in a small Nano tank, fits in the back with the pump so not showing in the tank itself.

Comments: Since I have gotten my first Jager and seen how they perform I knew I would stay with them unless I figure out a better one.
<br />Have to adjust it down and monitor it to see when it stops heating up and go from there.
<br />Never stayed on more than needed or stopped working when it was needed.

Comments: Seems to be well constructed. All Jager heaters have a calibration feature, and on the older ones, the pin you had to pull out to calibrate often stuck, and would be very hard to pop out. The new series has fixed that, using a second ring to determine calibration. The heater being submersible is a GREAT feature, which the earlier Jagers lacked. It seems to be accurate to about 1-2 degrees F.

Comments: After several other heaters that were much less than desirable, I was getting frustrated at the lack of quality in products out there. Then I bought this Jager heater, and I am completely satisfied with it. It keeps my tank at the exact temperature I set it, and I don't have to worry and test any more. After initial testing, I found that this one is on the money. The only thing I see lacking is a light to let you know when it's running - but that is just not necessary, because this little heater can be depended on. Great product, and one less thing to worry about.

Comments: Its glass and has a dial at the top to adjust the temperature, they have thicker glass and are less prone to breaking and destroying everything in the tank. The suction cup mounting has held in my sump for over 3 months and works great.
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<br />Get a dedicated controller with any heater regardless of brand!!!!

Comments: I use this heater and love it. I find that it is very reliable. Easy to use and economical. A good buy if you are looking for a quality heater.

Comments: great heater! much more stable than my previous heater...works great. fully submersible unlike the previous generations.

Comments: Excellent heater for the price. Both durable and dependable.

Comments: Great heater, very precise and heats quickly.

Comments: This heater has a great design. I would have rated it a five star but it seems that was not calibrated at the factory. Once it was dialed in to the right reading the tank is within 1 deg.

Comments: Wish i had read the reviews on the jager heater,before i had bought a fluval 200w heater.The fluval did not reach 93 degrees as advertised.The jager performed as advertised +or-1 degree.

Comments: I just bought this jager heater 250w for my 120 gallon tank from petstore.com.It's work excellent!My room temperture is 70 F,goes to 79 F quickly and accurate!Some people maybe say it's too long,but for me it's OK,cause my tank is 24 inch high.

Comments: I have had these heaters for about a month. (I bought 2, 1 for a 75G ciclid tank and 1 for a 55G reef tank )and they seem to be very precise, I have a digital thermometer and a mercury thermometer and so far they both are keeping the water temp at what the dail reads. they are nice looking and working correctly.
<br />typical German engineering.

Comments: Good Heater. good price. I use this heater as a backup to my other Jager when temp. in basement drops so does water temp. Comes with suction cup mount.

Comments: I give this heater (250 watt) a 5 star rating because of my history with JAGER. I have used JAGER since I got into the hobby in 1998 in all of my set ups. Every one I have had did not fail! The temp stays where it should. The new and improved JAGER are excellent since they are approved to be submersible, like they were in the past. I have banged rocks into these heaters and they do not crack or shatter like you think a glass heater would. They are very durable. I say buy one of these because I never had one break or not do its job. I always hear of titanium heaters that cost double, fail. Every system should have two heaters running in case one fails.So the bottom line is they are dependable, strong and priced right! And this 5 star rating means you will not be disappointed!!

Comments: As with all Jager heaters, it's perfect. Even better now that it's fully submersible.

Comments: I purchased 4 heaters to use on a rack of four 10 gallon aquariums. The water temperature was 72 degrees +/- 1 degree before heating. The heaters came preset for 78 degrees when plugged in. The four aquariums ranged between 74 and 78 degrees after 3 days. When upped to 81 degrees on the dial the tanks still only reached 79 degrees.The temperatures are consistant though. Do you want accuracy or precision? I hope they last a long time.

Comments: Since adding this heater to the sump of my 135g the water has not went below the set temperature. I bought this to replace a Stealth of the same wattage and this is better without a doubt.

Comments: I purchased this heater and it has worked perfectly. It turns on at the right temp and turns off, no mistakes or malfunctions and keeps my tank at the right temp always.

Comments: When my Jager heater died after a good long life, I got some other brand because it was the only thing available locally. Big mistake. The Jager allows precise temperature setting, and it sits on temperature without wandering. Highly recommend this brand.

Comments: I just bought this heater because my other heater just couldn't seem to handle my new reef tank. This one has handled it beautiful!!

Comments: This heater seems well built/designed/value priced.
<br />I did have to re-calibrate the knob twice to set a correct temp.;
<br />so you should have an accurate thermometer to check against. I bought a digital from this site.
<br />Save the instructions for this procedure.
<br />Jim

Comments: This was my second Jager Heater - my first was a smaller 7 inch 150W version that was marginally adequate for our 50 gal acquarium when the room got really cold. I love this larger unit - oversizing the heater means the acquarium stays at the set 74 deg regardless of what is happening in the room. These are high quality, long lasting, reliable units. My experience has been excellent.

Comments: On my third heater in 3 months. First one was erratic. Second one DOA. And the third one refuses to work good most of the time also. I've been in fresh water aquariums for 25 years and have never had products as bad as these. I will never buy any more Ehiem/Jager products again. Very dissatisfied.

Comments: I have Jager Heaters on all my tanks. They are durable and keep the tank temperature very stable. I splurged on these new Jager heaters to replace some of my older heaters because they are completely submersible, and they are UL approved. I feel better knowing that they are completely water proof, and the UL approval is something few other aquarium heaters have.
<br />I've only had these heaters for a week, but they certainly seem to be of the same high quality as my older Jager heaters.
<br />I would hate to loose fish because I wanted to save a few bucks on a heater.

Comments: Quality that you can see. Good to see this item is UL listed (Tested for safety)when so many other items in this industry are not. Saltwater / salt creep = conductive. I gladly pay more money for this item knowing it will not kill me.

Comments: and read the listing. This is not a submersible heater, so mounting horizontally down in the aquarium is out.

Comments: I simply love this heater. Very easy to adjust and it is relatively short so it makes it easier to hide.

Comments: Worked fine for about nine months but it has died. Not impressed. The temperature was fairly accurate but nothing great. I'm NOT buying another one.

Comments: I set it at 78 and my temp goes up to 82.
<br />I unplug it and watch my temp drop. I had try
<br />the second one I bought, same thing. Either
<br />my brand new digital thermometer is faulty
<br />or these heaters run way too hot.

Comments: I have always loved both Jager and Stealth heaters. Currently I am using Jager models in three of my tanks, both fresh and saltwter. All of which have never faltered in temperature.

Comments: Have one on 75 gal. Overall it has been a good heater.

Comments: great product, easy to install, holds steady temp. took 1 week to ship.

Comments: I would recommend these heaters. Well built, good quality.

Comments: I liked that the casing was 2mm thick of Pyrex glass. I used two 150 watt heaters on a 70 gallon reef system and I never had any problems. I replaced one of the heaters because it no longer remained steady, but it should be noted that I kept it completely submersed and it started this behavior after about a year. It was time to replace it anyway. I would buy this heater again.

Comments: Keeps my 100 gal. tank at the correct temp. all the time

Comments: This is the BEST heater I have ever owned! (I've had about 5).
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<br />Definitely worth the price. I have a solf shell turtle that tears up EVERYTHING Possible in the tank. He's constantly drilling his way past the heater banging it against the glass but no worries.
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<br />Being waterproof is also a Very Nice Feature with the amount of times I have to deal with the water level. Very accurat and reliable heat settings.

Comments: Keeps my tank at a perfect temperature. My fish seem to really enjoy it.

Comments: i got it... set it on 78, went to sleep that night... When i got up for work in the morning the tank was at 88!!! I lost two fish... No matter what i set it on it would not turn off! Maybe it was just the one i got but i will not use this product again.

Comments: Purchased two of these 75 W heaters -- one to do most of the work for a small 20 gal reef tank, and the other as a backup and/or the extra heat needed for a 20 gal when the temperature outside the tank drops a few extra degrees. Out of the box, one worked great, just dial to the temperature and it holds it rock solid. The other doesn't work properly -- after an initial operation of a few minutes, won't even turn on again. I got the Jager because it had great reviews. I also use other heaters that have many bad reviews on this site, yet they've work for 7 years and still going strong with no problems. Guess that just goes to show these heaters are all the same basic technology, and not a perfect solution. Gave the Jager an average rating. Works well when it works (note - only had the one that works a week now, so we'll really see in the long run).