Hi,new to this forum and kept planted tanks a few years back.Still interested in this side of the hobby but at present run a reef tank.Its interesting to see advancements in thinking while Ive been away.What I,ve found quite surprising is the increase in flow and surface movement people seem to be opting for as I used to think this would only drive of co2.ever keen to know better my main Q is,do ph controlers have a place in systems now?