clutterydrawer
where is my mind?
"I didn't want to go overboard on my first go"
bigger tanks are far easier to maintain actually, they leave you more margin for error and are generally more stable
but anyway
I think the way to resolve it is to keep an eye on the levels and do water changes whenever necessary, although moving stock would help if you were desperate. Make sure you move that catfish out before he gets stunted though - I guess he should be ok for now if he's only 5cm but he'll need a good sized tank to get to his 15cm adult length.
bigger tanks are far easier to maintain actually, they leave you more margin for error and are generally more stable

but anyway
I think the way to resolve it is to keep an eye on the levels and do water changes whenever necessary, although moving stock would help if you were desperate. Make sure you move that catfish out before he gets stunted though - I guess he should be ok for now if he's only 5cm but he'll need a good sized tank to get to his 15cm adult length.