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Hi
RO unit for drinking, cooking and water changes with PPS-Pro will solve your problem. When you say 12 dKH you know most plants will not grow in it. But you got Onyx substrate so you have a good Ca supply, you don't need to worry about KH and Ca, just straight RO and a fertilizer.
RO unit for drinking, cooking and water changes with PPS-Pro will solve your problem. When you say 12 dKH you know most plants will not grow in it. But you got Onyx substrate so you have a good Ca supply, you don't need to worry about KH and Ca, just straight RO and a fertilizer.
