hroom88
Aquarium Advice Activist
Yesterday I added my NPK to 1 Litre of DI water according to the PPS-pro system. After about 8 hours I see white crystalline precipitate at the bottom of the bottle. I dont know which of the chems(K2SO4, KNO3 or KH2PO4) has not dissolved. Tried heating, shaking -does not work. What do I do now?