I run Jacks @ 3g, Calnit @ 2.5g and 1g of Epsom salt in veg only as I run LED's. I don't run any Epsom in flower under DE lights and at week 2.5 I add 0.5g of MKP. I run this from rooted clone to last 10-14 days before harvest. Last 2 weeks I'm lower co2, temps, EC, RH... pretty much drop all...