The information that you get from general hydroponics instructs you to use 5ml gallon flora nova grow for "growth ". If you were growing unknown strain of indica in about the 2nd week of veg. in dwc. at what strength would you start with . I don't have an ec meter & using ph test kit, which kinda sucks when your partly color blind. I used the flora nova at the 5ml gallon & had tip burning, so I removed a gallon & added a gallon of ph'd tap water. They are really looking good now & feeding like mad. The reason I ask is I need to change out solution as our water is kinda hard, so I was going to change out after a couple weeks just so that the salts don't go to high. The roots are looking good & air temps under control & water temps around 78-80 I know thats a little high but they seem to handle it okay.