Comments: This kit is a must for any serious hobbyist. It is easy to use and accurate. It's vital to keep the correct Calcium level in a reef tank. This kit makes it easy to monitor your Calcium level.

Comments: Just got this kit and tried it out on both my tanks. My ap test kit read one tank at 480 and the salifert read the tank at 415. 2nd tank read with ap at 440 and the salifurt read it at 425. Going to test with new water next week and will post what both kits are doing. Even though I do like the salifert kit due to it reads in increments of 5 and the ap reads 20 for every drop. Salifert was easy to use and I plan on working with this test kit for a long time.

Comments: Easy to use,accurate,reliable.No complaints!

Comments: I use almost all the Salifert test kits and I really like em. I find them easy to use and very accurate.

Comments: Great kit - no color chart comparison kits for me ! I get a good sense of accuracy with this kit

Comments: i got mine and its totally off. im surprised cause i read a lot of good reviews about it before purchasing. i guess i just got a bad one.

Comments: Easy to use and accurate.

Comments: Good test kit. Very accurate and easy to use. Better than the API test kits. Very long shelf life. A bit expensive but the results are worth the money. They also have instructions so you can use less amount of the reagent to get the results. You just multiply the answer.

Comments: When I first received this test kit, it registered about 50-70 ppm too high. I returned it for a replacement kit, and it also measured 50-70 too high. Disappointed, I did not use it for a few months. Now, for some reason, the kit is accurate. No reason why, I am using the same reference kits and the same refernce samples as before, and they are consistent.
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<br />For the past 1 + year that I have been doing this, I used Salifert, SeaChem, and Elos kits. There are pros and cons to each of them, and at one point I would have crowned each of them the best. But, as time goes on and I have used these kits in general I like the Salifert line the best. They are the eaiest for me to use, an are accurate enough for my needs.

Comments: Very easy to use test kit. Has a nice, easily identified color change at the titration end point. The only reason it does not rate 5 stars is that it comes in a flimsy, thin cardboard box that gets beat up badly with time.

Comments: Usually very accurate. Must have received old test kit because reading was off 100 ppm, but prior kits were great.

Comments: This year, the CA test kits are terrible. I bought one in the spring that was reading everything to be over 500, and one last week (8 months later) that did the same thing. I have a 10 gallon tank with nothing in it but 2 rocks and the same water for 4 months, tested in at 500, all 4 of my tanks are now 500 according to this kit, so is the freshly made saltwater too. For 4 years I've used these kits and right now, I wouldn't take one for free.

Comments: It is a decent Ca test kit; however, I keep having the same problem with multiple kits I have purchased. The # 2 agent bottle dropper does not work well. It sometimes dispenses only a partial drop while other times it will dispense multiple drops. Often I must repeat the test starting from scratch which at this price is a big waste. For a top of the line test kit, this is unacceptable.

Comments: This is the second one of these kits I've owned in a row, and it's reliable and accurate, as we've come to expect from salifert. The quality and precision is worth the price.

Comments: This test kit is straight forward and the results are a pink to blue color change that is easy to ready.

Comments: Great test kit. I feel that it's much more accurate than any other brand I've ever had.

Comments: The Salifert calcium test kit doesn't last very long - that is, it appears to read correctly when first used, but over time (over a months after being opened), its readings will be off by 25-50ppm or more.

Comments: good across the board. could use a reference solution for exact color change, but nice kit none the less.