A fast, easy and accurate test kit suitable for testing phosphate levels in freshwater and saltwater aquariums. It reads phosphate 0-10ppm (mg/l) High phosphate leads to algae growth and can enter the aquarium through tap water, fish waste or decaying food. As phosphate increases so does the chance of having unsightly algae and green water blooms. In saltwater excess phosphate can inhibit the growth of hard corals. This kit contains: * 2 liquid dropper bottles with child resistant safety caps. * easy to read instructions with information on how to test and how to correct unsafe water conditions. * 2 colour charts * glass test tube with snap tight cap.