Hi, i am worried that my plants aren't getting enough CO2 (you are going to say up it i know). I am running 1BPS on my 60l (comes on 2hr before lights and goes off 1hr before lights) after 4 hours, my DC is still blue :? If you look at my tank (in my sig) you can see that it isnt heavily planted so this seems like a lot of CO2 to me, other than that it isnt getting pushed around enough. it is the opposite end of the output of my fluval 205 (680l/ph - 11x turnover). Diffused by one of those cheap glass ceramic fdiffusers on ebay, the bubbles get pushed along the side wall of the tank and then that seems it (some go in the filter) and i dont think my plants are getting much at the other end - any suggestions? here is a simple illustration to try and show you : do you think it is ok or could i improve it?