So are epsom salts basically the same idea as cal mag? I don't live close to the hydro shop, and I'd like to try adding some for my plants. I've got crappy water, and I'm gonna be getting an RO system. My ppm is at 425 without my filter, and 350 with it. It hasn't been hurting the plants, but its seems to have slowed growth. I think they getten a bit locked up. I've used distilled water from the store a couple times, and they seemed to grow better. I just started flowering last sunday, and to be honest they havn't been growing much this week at all. I just watered yesterday with ph'd distilled water, with a 1/2 tsp of fox farm open sesame. It was the first watering since 12/12. I'm hoping by tomorrow, I start to see some more new growth. They look pretty healthy, just growing kinda slow for the last week. I thought maybe the cal mag, or if it works the epsom salts might help them absorb the nutes better, or something? What do you guys think? The plants are in my journal if you wanna see what they look like. The pics are like a page or 2 back, and about 4 days old, but they havn't really changed much since then. THanks TC