Im keeping both together bro...first day fight like world war 2...but aft 2 days fighting stop...but now n then will chase each other around without any cuts on body thou...but then still lucky my both powder can get along. ..
Its very hard n almost impossible to reach zero readings if u got lots of fishes n feeding them often bro...as long as u do regular water changes n fishes are healthy, u shouldn't worry too much....