i have a blower that i use to run sponges in all of my tanks i like the aqua clears but they get expensive both in intial cost and running cost. my main goal is breeding. so would 3 caves for three trios and some good size drift wood pieces for visual barriers do it you think?

i have been breeding bristlenose in a 30 gallon for a while now just sticking to a trio per 30 i was wondering how many i could safetly put in the 30 the filtereation is a large sponge filter and the tank gets a 50 percent water change once every or every other week