I was reading one of your responses in a grow journal but there are soooo many. You stated that hydro growers using RO will need to use pH up and/or pH down. I am running a Supercloset system, with a few personal modifications, so I am running (sort of ) RDWC, aeroponics, drip system, bubbleponics....you get the idea. Our water in Arizona has a ppm of 800 - 900 so I am running RO. I have a 16 gallon reservoir and grow a single plant at a time which fills the ( 2 x 3 cabinet ). How much pH fluctuation should I expect, and will pH adjustments be a daily task? I typically perform a res change weekly.