| | Re: Tiny super efficient CO2 reactor
I'm using this in my 15gal, it's slightly big, but not too obtrusive.
Because it's a small tank I have the flow control turned all the way down, and it's placed only very slightly above the gravel in order to reduce flow more and protect the critters. (I had to rescue my betta after he got his tail sucked in 5 minutes after I put the filter in - he was fine, just kinda confused)
I took a screw driver and stretched out one of the bottom intake vents and then placed the output from the bubble counter in there. It's working very well and the bubbles are super fine.