Comments: This is the best filter you can buy. It is a little pricey, but worth it. It will eliminate all traces of medication, nitrates, phosphates, amonia, coral warfare chemicals (for lack of a better term). It turns dull water crystal clear. It is also reusable! You will know what the filter removed from your tank by the color it turns. I highly recommend this.

Comments: I set up a nano reef tank and let it cycle for about 3 weeks before adding livestock, I'm currently using a polyfilter on my custom made fuge and thats it for filtration the water parameters are perfect and its crystal clear. Great product.

Comments: Every aquarist should have some in stock for the 'bad moments'.
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<br />I've used this for QT to make sure ammonia and other containments are always in checked.
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<br />I've also used this to remove copper from my tank after treatment of ICH and it did a great job.
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<br />The different colors that it changes is awesome in telling you what was removed. When I removed copper, it was a dark blue. Other times, it'll just be a brown for organics.
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<br />As to run 24/7, it would be an expensive filter media, but you can leave one in your tank just you need to setup a QT quickly.

Comments: I pride myself in providing the best water quality possible for my marine inhabitants. I was a little skeptical about buying one of the poly filters, but finally did after reading some of the online reviews. I am very very happy I did. Within 48hrs my tanks were noticeably clearer, especially in my sea horse tank. I am very impressed with this product and now use it on all of my tanks. Even my LFS is now using it in all of their display tanks! They have enough confidence in the product to use in a tank with $10K in corals!

Comments: Great product to use along side your regular filter system. You can see what it's doing by the change of color. This product really helps keep my tanks healthy.

Comments: I have been using this product for years. It is a very good micro mechanical filter. I use it as the last mechanical filter in my sump. This helps eliminate air bubbles in the tank return.

Comments: after 24 hours my corals looked even happer and my Yellow tang is yellower and tang'er then ever before!

Comments: I've been using this product for a few years now and it really does what it says. The filter material changes color according to the substance it is absorbing. I have a small reef tank that can't support protein skimming, so I use Poly-Filter instead.

Comments: I had read alot of good reviews of the poly filter so I figured I'd give them a try. I had treated my Fowlr with copper and had some phosphate issues with my tap water. I've sinced switched to a RO/DI system so I've reduced my phosphates quite abit. I also had a slight yellow color.
<br />Since adding the poly filter the copper has been reduced almost completely. I didn't see a dramatic reduction of phosphates. It didn't really remove much color though. All in all it worked ok. I will mostly try a carbon based pad next since it's so much cheaper and just as effective.
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Comments: I've only had the Poly-Filter in my tank for a few days but I've rinsed it out twice and I'm quite surprised at how it has discolored in such a short time. So, I think that it's doing a bang up job! The tank looks good and the critters seem happy.

Comments: I started losing snails left and right so I decided to do a Cu test. I had .5 ppm of Cu in my system. Within four days of using this pad my Cu was at 0.0ppm. Excellent product and well worth the money.

Comments: I've been using them for many years. With my larger tank I have found the 12X12's to be more convenient. Also I read recently that they're more of an industrial strength than the smaller ones. Is this true? I do seem to be getting longer life and that's a plus for me. I always recommend them when someone asks about my filter system.

Comments: I would highly recommend poly-filters, I have been using them to reduce the copper in my aquarium that was added by the copper in my plumbing in my house. They turn blue for copper and I am amazed at how much they have reduced the copper level in my aquarium. Excellent product. Thanks Tonya

Comments: works very well for removing flatworm toxin after using flatworm exit.

Comments: i have high silcates and phosfate levels in my tank and this was an excellent solution to my problem
<br />is user friendly and the color change is very usefull

Comments: I've heard a lot of praise online for Poly Filters, but I honestly didn't notice much difference in my tank as a result of using it. However, I admittedly don't have a lot of phosphates, nitrates, etc. to remove in the first place.
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<br />I'd say it's a little easier to work with than the Pura Pads and slightly less prone to clogging, but not by much at all. If you're on the fence between the two, the Pura Pads will probably deliver the same results for less money. Still, a decent product.

Comments: This was recommended by one of my friend. He's tried this and work great for his tanks. So I tried it and it really did the job. Clean up my tank real good. It turn brown within a week. So I know its absorbing unwanted things in my tanks. I use it for all my tanks now.

Comments: Works well...allthough doesn't last very long.

Comments: This stuff is great. It really does what it says and leaves water sparkling clean. In my area the same poly filter goes for 17.00 bucks in local pet stores. Great bargain at Marine depot.

Comments: Very good product!!!! Works well with my wet/dry system!

Comments: It must 've worked good since within a week it turned brown. I must have had a lot of bad things in the water (ammonia, etc) that it sucked up. Next it should turn black, and per the instructions the life cycle it done and you throw it away. just wondering how long my second one will last...

Comments: the poly filters are the best filters i have ever used.

Comments: I have had reef tanks for 10 years now and have always used poly filters as a type of mechanical filtration. They really do help with removing unwanted wastes.

Comments: Good product, have used it for years. It really works.

Comments: Does what it advertises very well. Used in both fresh water and reef.

Comments: Filters are just great. Save a lot of time on extra work and money. Strongly recomend to all who has fish tanks.

Comments: Very excellent product,makes my water very clear. Highly recommended to all.Thanks to you guys for the recommendation.