Do you really need to pre-mix them? 1/4 tsp is just as easy as "12ml". If you feel you must do this, only mix with RO/DI (or distilled) water, add a few drops of HCl to each bottle to keep bacteria out.Capt. said:I'm thinking about pre-mixing all my dry fertilizers with water. I'll do each in separate containers. Will this work and how long will they last mixed? Should I keep them in the fridge?
Today I bought KNO3, K2SO4, MGSO4, and KH2PO4.
I keep a paper cup under the tank, scoop some tankwater in, add the dry ferts, mix with another cup, then dump in tank real fast, keeping all ferts separate.Capt. said:I've only dealt with liquid fertilizers, nothing dry. That's why I was thinking I should mix them into liquids.