I like seachem products and have used their tests before but ...
931824
I like seachem products and have used their tests before but unfortunately I didn't check this package until 2months after I received it.  It only has 7 of the test discs and they all turn purple no matter what.  I wanted it as a backup since I was getting weird results with 2 different API kits.
3244242
Failed water test with tissue paper, I let it dry and tested again in case a seal wasn't proper and same thing.
2716941
Had been using product from this site for a few weeks.. Nothing!
Got a sample from a med spa..saw results first day..
Maybe price was so low because it was an old batch??
Will not purchase online again
4006501
I want to like this product, I want to give it five stars, but that fact that I am on my second unit and am still having water that tastes of chemicals forces me to give it a two star rating.  Upon arrival of both units I mixed up 7.5 grams of citric acid powder and ran a cleaning cycle, dumped the water and refilled again with tap water, brought the water to a boil, and dumped that water.  I than used bottled spring water to fill the machines up for the taste test and found once the water reached 208 degrees F that in both units I was getting a chemical taste and odor from the water.  I mixed up some more citric acid powder in warm water and ran another cleaning cycle, dumped, rinsed, and refilled again with bottled spring water but even after two cleaning cycles and two rinse cycles I was still getting a taste of chemicals in the water.  I want this machine to work as it would make a lazy man happy but I am at a loss as what to do, obviously the second machine is going back to amazon, but I am debating on whether or not to exchange it or just get a refund.
94874
This is just an iron supplement like Seachem's Iron, or any other brand. One of the things I liked about this product compared to say sachem's, is that this includes a measuring cup.
4876598
It's difficult to tell if all the test sites on the strip are accurate. The strips say that my tap water has a safe amount of chlorine for fish, but I can definitely smell the chlorine when I pour the gallon or so needed to clean my tank. Seeing there might be a problem with the chlorine site, I wondered if the other sites were wrong too. Especially since I got these for $20 when the original price was $70. They may have been out of date and that's why they were so cheap (if, indeed, they had ever been sold for $70).

To test it, I bought a 5 pack of 5 site test strips from Petco. They had an expiration date and were individually packaged, so it's safe to assume their test sites are good. They showed the same results as these for the sites they had in common. I'm still not sure about the chlorine site. I take every precaution about the chlorine, and trust the strips for everything else.
1702766
We just purchased a new water softener and I needed more that the one test that the manufacturer supplied with the product.  I test the water every so often to check to see if the softener settings are working as needed.

Lots of test for a very good price.
4029318
I like the products of the "Chemical Guys".. i tried once of their product and the result is true.. so from then, i believe what their product says..
3968220
I use this product for testing water. It is a good product and gives me the same results as the ones I buy from the OEM of my tester. I could buy from my testing company for the same price including shipping cost but I don't like my testing company and they are unreliable.
4597861
I was somewhat surprised to find that this was not a cream.  It took some getting used to, but I like it now.  I was not sure about its fragrance and have come to the conclusion that I like it.  It reminds me of the sea.  I take turns between this company  and another that I really trust.  So it does not get steady use.  I have used it under makeup and since it disappears so fast and so well, I am not certain that it is working.  The serum is light, not greasy and that is where my confusion lies.  However, I will continue to try it for another month or so and update this if I notice any real changes.  It took me a long to time to get this way and magic is not available yet, even on AMAZON.
4145346
I was cautioned about the metric only measurements on the liquid cups.  (The dry measuring cups are standard,  but I haven't checked the volume accuracy.) However,  I want to caution about two other issues.  One is the odor.  They smell like fish. I've soaked them in baking soda for an hour but odor remains.  The second relates to my OC nature.  I can't stand stickers.  I tried to soak them off after peeling didn't work.  The paper soaked off but not the adhesive.  When I tried a spot of Goo Green dissolver, the adhesive still remained,  but the red measurement markings disappeared.  I wanted these for the kitchen,  but I think they'll end up in greenhouse or shed.
EDIT: The smell dissipated overnight. I also checked the accuracy of the dry-measure cups. The 1 cup and 1/2 cup are accurate if filled to the brim. The 1/2, 1/4, and 1/8 cup require filling halfway between the beginning of the spout and the top rim to be accurate.
3041203
Seachem's line of Cupramine Copper and their Copper Test kit worked well in treating several fish (including several puffer) for ich and other parasites. I have no complaints, and the instructions (at least on the copper additive here) are dead simple.
3567389
Test strips are easy to use, but do not accurately measure chlorine levels and ph levels. They seem to read higher than actual chemicals in pool.
2603464
I have been using Seachem products a long time.  But be careful using this product because it killed my goldfish on the next day.  Don't know it's caused by the product or what ....
590664
I've been using this product for years, but at least the first bottle doesn't have the same flavor AND seems salty. It's not the seller's fault, as far as I can tell. I'm set to contact McCormick on this.
2595904
+ Test chemical already in fine, powdery form in small sealed square pockets
+ Dissolves quickly and takes only 1 minute get result; a competing product takes more than 4 minutes
+ Has longer shelf life than a competing product
+ Color chart simple to use to bracket the result phosphate ppm
+ Accurate results (compared to water tests performed by local pool product store)

- Incorrect product description:  20 strip count and Just dip and wait 15 seconds.  Actual item is test powder in individual sealed packages

After an algae bloom episode a couple of years ago due to high phosphates while having residual chlorine, I started to use this Aquachek product and Phosfree to monitor and control my pool phosphate level.  I also used a competing phophate test kit at the same time to determine which was better.  The color result from the competing test kit was a much darker blue color (higher phosphate reading) than that from the Aquachek.  Comparing both to the phosphate test result from the local pool store showed that the Aquachek test result was accurate while the other one was reading too high.  Also, the other product were small individual tablets instead of powder form and took about 4 times as long to dissolve as Aquachek.  It also expired faster as Aquachek, as its tablets were contained in a rectangular strip with aluminum back and apparently not sealed as well.  After a few months, the tablets turned black or a rust color and were no longer usable.

The Aquachek color chart may not help to nail the actual phosphate down to the nearest 50 or 100 ppm, but it can help to bracket the phosphate level.  I have been able to use this test kit in conjunction with maintenance doses of Phosfree to keep my pool water clear and algae-free without the need to make trips to the local pool store for water analysis for phosphates.  I plan to continue using this product going forward.
1340770
Be careful when buying Seachem's Matrix or "The Bag" because the quality can really vary. In the case of Matrix (which I've used for many years) most of the stones should be uniform in color/composition; see the photo for what you do not want to receive. If the canister they sold Matrix in was transparent, this problem would be more apparent, but the containers are opaque and sometimes filled with large gravel chunks mixed in with actual Seachem Matrix. This is an item I would suggest buying from your local aquarium shop, so you can inspect the contents before leaving. In the case of Seachem's "The Bag", the old design is prone to tearing and separating along the seams. I don't have an image available, but the newer design is MUCH more robust, and even slightly larger. Good luck!