I use tap water for my plants as it's basically my only option. I've got six plants at about 9 weeks and they take a lot of water. I try to let the water sit 24 hours to get the chlorine out, but how necessary is this? I already have seven gallons of water sitting around, it takes up a lot of space! Wondering if some of you veteran growers have experience with just running water straight from the tap? Did it affect the plant in any way, could you see a difference when allowing the water to sit out? Will the straight tap water kill any micros that I add to it?