My water is 450ppm out of the tap. I just watched a video that claimed anything over 300 is really hard. I have been adding nutrients that bring it up to 800ppm or 1.5 EC.
My girls appear to be growing fine (40 days in), but i notice my pH in my resevoir rises daily. From 5.8 to 6.4 over 24 hrs.
Should I consider an RO system with this kind of water? Would it mean less pH adjusting (I adjust nearly daily now).