Oh ya, with R/O water calmag or the like is a must! But I only use about 1/4 to 1/2 tsp per gallon on feedings only. When just watering the straight R/O does a nice job of cleaning the salts from the soil. I feed, water,feed, water, water, feed, water, feed, water, water. Works great for me. Also be easy with your nutes to start. The plants have better access to them in R/O water.

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