Red Sea Fish Pharm ARE21425 Saltwater Phosphate Pro Test Kit for Aquarium, 100 Tests

Excellent product. I had never used a kit like this before so it took a couple uses for me to get the hang of it but now it's easy to use.

If there was a 6th star it would get that. Red Sea makes amazing products. I had API test kits. Those are now gone. I will never test my water any other way then with Red Sea.

Color chart is very hard to read since the colors are so close but then again most test kits have the same issue. Other than that its a very nice Pro Kit and I use it often.

Excellent test kit from the industry standard - Red Sea.

I have ordered two of these test kits through Amazon. Both were obvious returns, and both had leaked test reagents - Tin Chloride and Sulfuric Acid all over the box and test kits. These are both hazardous materials. As a result they are not returnable. I will likely get a refund, but now have to deal with hazardous materials disposal. I have no idea how well the kit works - both that I received were unusable.

I like Red Sea test kits. They are 2nd to Hanna digital tests imo. But it’s really disappointing when you order this 100 tests PO4 kit online and it expires in October this year?! Even if you test weekly it’s only 52 weeks in a year. Not worth it to return and repurchase elsewhere but I know I won’t be ordering it online again. They should try to make sure it has at least 2-years left before expiring when selecting these for online customers. I’ll stick to my LFS from now on even if it costs a little more.

Easy to perform. Easy to interpret.

Product is great, very easy to use and to identify colors. Other products I've used to test phosphate are very tough to read the colors and identify how much phosphate is in the water. The reason I give this three stars is the packaging from both red sea and amazon is not done very well. The bottles could be packed tighter in the red sea container and the amazon box could also be packed tighter with more paper. When I received my product their was some liquid in the red sea container (not much) but enough to pretty much ruin the color disk that you use to identify the color corresponding to ppm value. It is still useable but very hard to read colors.