I was hesitant to purchase this test kit because of the prior reviews which complained about the test being inaccurate or difficult to perform. However, I am glad I purchased this kit and I think it does a great job. These do take a bit longer to perform than standard tests, but I didn't find anything overly difficult or complicated. The accuracy of the Iodine test was particulary good. I tested my water and it reported back that my levels were low, so I dosed to bring them up to my desired level and tested again. My second test reported back the exact PPM that I expected based on the original level determined by my first test, plus the amount of Iodine that I dosed. Pretty awesome! I would recommend this test kit to any reefers that have a solid background performing other Red Sea test kits. I find them to be relatively easy to perform, and the results to be accurate. Thanks!

I love Red Sea so let me try to be fair. Potassium kit takes forever to perform and does not work. I never could see the titration endpoint. Double checked my work using Salifert (which is way easier) and found accurate results. The iron test seemed to work at first purchase but stopped giving results a year later. Iodine worked well. Red Sea, please improve this product or stop selling it as it hurts your reputation. My new strategy will to use ICP on occasion rather than home kits like this.

I love red sea test kits except this one iron and iodine tests are good to me, but the potassium kit is terrible. I performed the test 3 times which took 1 1/2 hrs to do and was not able to get a color change from purple to blue. I even made my wife watch me do one and she never saw the change in color as well it always stayed purple. I performed a icp test on my tank water and the potassium reading is at 374 so about half way through the reagent the color should change from purple to blue but never happened. ill use another test by another company for my potassium readings.

I was having trouble with keeping SPS so I ordered this test kit. The first kit came and the tops of 3 of the reagents were loose and leaked all over the inside of the box. Emailed BRS, and they were right on it, sending me another kit, but this one was leaking as well. It was not as bad as the first kit, but still leaking so I combined the good items from each kit to make 1 good kit. Testing with this is pretty easy as long as you follow the directions, and after a few times it was even faster because you figure out how to prep better for each test. Overall the kit is a must have and aside from the leaks, it's great, especially if you want to maintain SPS.

I WAS SHOPPING FOR I2 TEST BUT BRS HAVE IN STOCK TRACE COLORS PRO MULTI TEST KIT (I2,K,FE) FOR GOOD PRICE, SO I DECIDED TO HAVE IN MY KIT EXTRA TESTS FOR MORE PRECISION TESTING OF MY WATER . END IT IS RED SEA TESTS I CAN TRUST

I WAS SHOPPING FOR I2 TEST BUT BRS HAVE IN STOCK TRACE COLORS PRO MULTI TEST KIT (I2,K,FE) FOR GOOD PRICE, SO I DECIDED TO HAVE IN MY KIT EXTRA TESTS FOR MORE PRECISION TESTING OF MY WATER . END IT IS RED SEA TESTS I CAN TRUST

Difficult to execute correctly and take a lot of time and reading is not accurate

Just tried the Potassium test. WOW, good luck with the color change. Red Sea your better than this!

This is a nice test kit. I takes time (30min or so) to do it but seems to work fine.

This kit is very helpful if you are dosing these elements. Refills are economical.

I love most red sea products except this one. this test kit is fairly hard to use. this is coming from someone with a background in sampling water i can get it done but it takes me about 30 mins. seems like it doesn't have enough test tubes to get all three tests done at once because two tests require that you wait I would like to perform them both at the same time, also having to use the same test tubes looses sterility between tests with the residue form the previous test even after washing, I will be looking to another brand of test kit in the near future.

Not difficult at all to do. Accurate. And reliable. Exactly what I expected

My LFS says that testing Potassium is one of the hardest tests to do, but I didn't see any trouble with this multi test kit. They are more advanced than the typical test kits, and definitely more room for error, but I enjoyed testing with this kit. The directions are clear and concise, and there are youtube videos that Red Sea releases for each and every test kit they make. That alone is priceless!

I have been in contact with Red Sea. They were out of stock but eventualy provided an iron test kit refill for free which works properly. I also have discovered that running activated carbon removes iodine which explains why I never have an iodine present in my system. I am giving this a 5 start review to counteract the 2 star previously given. All in all, I feel it's a 4 to 5 star product. Weather dosing these is usefull or not is hotly debated. But if you do, Use this kit.

Bought this kit. I am a skeptic by heart and I love the idea of being able to dose things based on there actual levels and not just "add once a month" etc. The Iodine and Pottassium tests seem to be working but the iron test reads 0 even when I add a drop from the Iron supplement bottle. It is not uncommon that a test solution will get stale after a few months and stop working. I have emailed Red Sea to see if they will send me a iron test refill kit. Over all I'm starting to think that knowing what colors are "Dull" and dosing based on that might be a better Idea. If it ain't broke, don't overdose it.

I am still debating the value of this test kit, and the experts are still debating the need to dose these. Usually water changes will provide what is needed, but this kit will let you know if you are within a range of parameters.