I need to start using ferts because my lower leaves have statred to turn yellow and get dead spots i found out that i need k and i realize now that because i just started using 6-3-0 i had laying around it was unballanced. so im going to make some of sids mix using miracke grow patio, epsom salt and o2 pluss. but how often do u use the mix will i keep on adding the mix every time i water? do i ever just use straight water after starting ferts besides flushing? And i can use sids mix for making hydro solution for soil right?