10 gallon has gravel vac tube on outlet of Eheim 2015 (old filter which was given to me) with co2 feeding into this tube and filter material stuffed in end to keep bubble action in tube. I'm not sure why more folks don't use this setup as it is so simple to build.
37 gallon has an old Jungle Fizz Factory diffusion bell about the size and shape of an exra long butter dish cover - 2"wide by 8" long by 2" depth. I have the inlet of an Eheim Ecco filter placed so the current is pulled along the bottom of the diffuser.
I'm using alkalinity and pH test kits by Hach. I'm not sure I would trust the levels I'm getting except for the amount of pearling I get and because the gasping fish agreed with my testing.
CO2 bottles are standard double 2 liter setup for 37 and a single 1 gallon for the 10 gallon tank.
Bill |