Easy-Life Water Test Phosphate PO4 is a very accurate testkit for determining the phosphate level in freshwater, marine water or ponds. The very sensitive and accurate Easy-Life Phosphate testkit is suitable for fresh water and marine aquariums. There are two different ranges within the testkit. A low range from 0.00 - 0.10 mg/l (ppm) and high range from 0 - 2.5 mg/l (ppm). The Easy-Life Phosphate water test only needs 1 reagens!Easy-Life Water Test Phosphate PO4+ suitable for fresh water and marine aquariums or ponds+ easy to use, reliable and ultra sensitive+ colortest, easy to compare with a color chart+ PO4 detectable from 0.01 mg/l (=ppm)+ low range: 0,00 - 0,02 - 0,04 - 0,06 - 0,08 - 0,10 mg/l (=ppm)+ high range: 0,0 - 0,5 - 1,0 - 1,5 - 2,0 - 2,5 mg/l (=ppm)+ testkit accounts for 75 tests