two FX5's is the top of the filters...but your water changes are good. i tend to run 4 times turn over rate....125gal's, i need 600gph turn over rate. so, your 270gal needs 1080gph turn over rate with the stock your got. so you can add that fish...
1 more question: what's the dimensions of your tank?
1 more question: what's the dimensions of your tank?
