Hi i have 5 4 year old reds quite fat now 3 females 2 males iam pritty sure as they spawn alot got a 14 inch pleco also in 400l tank been offerd a 600 with 24 inch plec an buster a red tailed cat fish will he eat pirahas an will plecs fight i may not take buster an just put my 5 in will have my fx6 canister an fluvel 4 internal 4500 lph any tips guys these were my first fish got as babbys