2 notes
- CaCO3 has limited solubility so you may want to pre mix it in a little hot water, then add it in w/ replacement water during a pwc.
K2HPO3 (dibasic potassium phosphate) is more readily soluble than the monobasic variety and it adds twice the K per unit. Drawbacks - may not be as readily available to everyone, pH is higher than for the monobasic. There is a "tribasic" out there, but it's even less common in labs etc., pH would be higher still and it's no more soluble than dibasic (if memory serves). |