i have a ro filter this one http://www.hydrologicsystems.com/content/view/12/87/or an ro unit, preferably a 5 stage DI. OR could use things like dried peat moss to lower the ph.
thats what i wanted to know whats the preferable range before i have to intervene,these days i set it at 5.2-5.4 then tomorow it gets to 6.0-6.2 again i get back down and like that for 3 days,are u saying i shouldnt do that,whats the uper limit before i need to get it downThere is no problem with it shifting in that range. The worst thing you can do is chase it around trying to keep it at 5.8.