D-D Phosphate Test Kit
A high sensitivity test kit from D-D to monitor Phosphate levels in reef aquaria.
We advise that the Phosphate Kit is used as part of a complete testing regime that includes the D-D Multi, Nitrate and Iodine test kits for best results and to help monitor complete aquarium health and nutrient levels
Natural seawater has an average phosphate concentration in surface waters of around 0.005 ppm PO4 with levels below 0.1 ppm PO4 being recommended for aquariums containing stony corals up to perhaps 0.25 ppm PO4 for more tolerant species. Levels below 0.005 are also undesirable however it is unlikely that you ever achieve a zero phosphate state due to the amount of phosphate added during daily feeding.