what is the the most efficent co2 reactor/ mixer

[DEFENDERZOOK]

what type of filter are you running......?

is there a reason why the return from a canister filter is not used to diffuse the co2.......?
or are canisters too powerful for planted tanks......?

[xitsurf]

ive just built a 'rex reactor' , external diy . I will test it out in the next few days and post a comment.
hopefully a bit more efficent.