iv been wondering the same myself as tomorow im 8wk flower and getting ready to flush for my harvest my tap water holds at 7.3-7.4 on its own and dont wanna ruin things right at the end. been using ionics and with that iv been a steady 6.3 all the way through and my run off has been the same but with 2wks of just water i really am unsure lol
id say my bitches are looking very sexy rite now with serious amounts of crystals and just hope it doesnt affect them . anyone no of anything good to bring the ph leval down without harm?