As far as I know there isn't a set number of fish per "proper school" 8 should be fine... unless you want more. In my experience with Tetras they all school together regardless of size or specific species.
As far as I know there isn't a set number of fish per "proper school" 8 should be fine... unless you want more. In my experience with Tetras they all school together regardless of size or specific species.
As far as I know there isn't a set number of fish per "proper school" 8 should be fine... unless you want more. In my experience with Tetras they all school together regardless of size or specific species.