I'm trying to make up my mind on what ebb and flow system I should start with. I've narrowed it down to HTG Supply's class-5 ebb and flow. Six site system. Or Greentree flo n gro ebb and flow system. I've heard good things about the Greentree but can't seem to find any reviews on the HTG supply one. The HTG is much cheaper but I'm worried the quality might be cheap as well. Anyone ever use these systems or have any recommendations?