Space is definitely an issue for me. I have my aquarium on a microwave cart with a small cabinet underneath, and will need everything to fit in there. I feel pretty good about a 5lb tank fitting, but a large regulator might be an issue.
in line reactors are used with canister filters right? My 10g is a betta community tank so I want really low flow and use a sponge filter, so I think I’ll be stuck with an in tank diffuser as my only choice.