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@Jrodriguez83, I always water to runoff and I always check the runoff ph and ec. Coco is feed feed water feed feed water. Always wait for your top to dry out some. Your ph range is 5.5 to 6.0 but 5.8 being the sweet spot for veg. 6.0 to 6.5 for after flowers start., with 6.2, 6.3 being the sweet spot for flower.
Only add cal/mg when you see they need it. Once every week to 2.
100 to 150 ppm 0.2 to 0.3 ec and when you do give cal/mg take away the same amount of your grow or flower nutes so your not going to high on the ec levels.
@GMSgrows,damn so I gave the plants some water with nutrients and when I check the run off it was at a 1000.it was at 160 when I put it in.can run r/o water through it.i have no idea what to do