Can some one at least give some ideas, anything would help and be appreciated.
Do you mean you have 10ppm nitrates out of the tap? If that is the case, then you probably do not need to add much more. If you do not have nitrates in your tap water, then dose enough KNO3 to give you about 10ppm. Dosing dry might be more convenient - though I dose from a bottle of home-made KNO3 solution made by disolving 2 tablespoons of KNO3 in 250mls of water. If it is indeed 10ppm nitrate out of the tap, you might consider adding some PO4 to keep the nitrates and phosphates in balance (10:1). I am not familiar with Kent phosphate, but you could use the Fertilator to calculate an amount sufficient to give, say, 1-2ppm PO4 level and dose that once a week. You could halve the dosage amount and dose twice a week too.10 ppm. nitrates