I agree, your R/O will remove most of the mineral salts from the water making it safe to use on your orchids. One word of caution, make sure that the fertilizer you use contains calcium and magnesium. Some fertilizers don't contain those two elements because the manufacturers assume that calcium and magnesium is already in your tapwater. The R/O system will remove all salts including calcium and magnesium. If your fertilizer doesn't contain calcium, you can use a cal/mag supplement a couple times a month. The supplements are available from hydroponics stores or online.
Last edited by tucker85; 01-07-2014 at 11:56 AM..
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