API 5-in-1 Test Strips 25 Count PhosZorb Clear plastic instead of frosted

Clear plastic instead of frosted opaque

Advanced: Determine the strontium concentration in the aquarium using an accurate test kit before supplementing

and formation of

Once desired [Ca2+] has been acquired

For use with marine and reef aquariums only

API 5-in-1 Test Strips 25 Count PhosZorb Clear plastic instead of frostedAPI 5 IN 1 TEST STRIPS are the quick and easy way to test the 5 most important aquarium water parameters pH, KH, GH, nitrate, and nitrite in one easy step. Simply dip one test strip directly into the aquarium, and compare the colors on the strip to the color card provided to help prevent invisible water problems that can be harmful to fish. Each kit includes detailed information on how to interpret the test results and correct unsafe water conditions.