today i got my K2SO4 & KNO3 so made the solution
and my NO3 and PO4 is undectable or very less from JBL test kit
so how much ml of k2SO4 i need to and how much ml of KNO3 i need to add?
my tank is 220G and size is 72*24*30 and now iam adding only JBL ferropol about 20ml weekly after 20% water change
help me about this