I am having trouble getting higher C02 concentrations with my Red Sea 500 reactor. I'm using the DIY drop checker and it's green most of the time, but I'd like to get it yellow and crank it up a bit to help with a small algae problem. Any suggestions? I'm hearing about diffusers and such lately, but not sure how they would work with my Red Sea C02 system. Currently I can't run more than about 1 bubble per second without it losing efficiency.