Co2 DYI reactor

[chlymo]

I've used the tablets they aren't worth the paper they're packaged in. The canisters are a little beyond my budget. I have hooked an air pump up to my reactor to help stop the back flow of tank water but I bought a diffuser it worked fine the first day but it seems like it's putting pressure back in to the reactor and won't allow any air or co2 thru however there are no blockages as if I take it off and put the airstone back on it works fine.