Im having Iron, Mag, and Cal deficiencies in Subs SS. Why? NEED HELP!!!!!

wolfpack4ever said:

it says in subs super soil thread to add 1/2 cup powdered calmag for 8 bags if using RO water but in your case it would be 1/4 cup for 4 bags.
not sure if this was mentioned but i think it could be the problem!

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keepitcoastal said:

people saying RO causes cal mag deficiency... thats in coco. and the calcium and magnesium found in tap water has too large of particles to even be taken up by your plants... what your preaching applies to coco. in most soil mixes the calcium and magnesium are supplied by the lime or other amendments... dont preach what you dont know. RO water in a proper soil mix will not give you any deficiency s and if it does give you one it would almost certainly still be there if you were using tapwater too!! the RO water is fine work on your soil

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