you could refer to my CRS tank setup. im also trying to breed them in a 5 gallon, but its a lot more effort to keep the water parameters stable. i know a breeder that just does 1 50% water change a week and feed everyday with a 30 gallon+ 2 canisters. i have a 5 gallon wit 2 HOBs. i do 3 WCs instead of just 1 because the concentration of toxins build faster than in a 30 gallon.