its recommended but not necessary. prevention is easier than fixing
phatsesh101 Reviewed by phatsesh101 on . Do I really need Cal MAG? I havn't been using cal mag at all. I use purified water for the res right now. Do I really need Cal mag? I'm in flowering stage its the 2nd week. I'm using Connosieur A+B and Big Bud. If I'm using purified water and those nutrients do I still need Cal MAg? thanxs Rating: 5