Hello , i have been using canna for about 4 months , i use it in all 3 of my hydro systems. I have noticed that i have had problems in different plants, some look like calcium, others look like mag , some look like iron. I have grown good ,solid plants using this but would like to know if there is something else i can get to replace all the minerals in my water. I use ro water, and always check ph. I recently bought call mag, tried it in 3 plants a few days ago. Is there anything they sell to add the important minerals back into the ro water?
THanks for any adivce.