Ray, how would I choose which formulation of K-lite to use? For example, I just installed a (still adjusting) RO system, so my water is fairly pure. However, I also have some orchids in a mineral composite aeroponic setup, which leaches calcium, and my new paph seedlings have a special limestone/oyster shell/silica something top dressing, so I'm getting extra calcium to them as well.
Should I get the pure water formula, or is the extra calcium I'm adding to the plants making it necessary to reduce the calcium in the fertilizer?
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