tap water is Ph 8.0 with Hydroguard and Orca , then add Holland Secret at 25% veg formula, then Ph down added to bring it to 5.5. PPM is 400 after a week plants are drinking about 1 liter a day. PPM down to average 370 Ph up to 6.9. I top off each every 2-3 days, with 2 liters of water...