I hav a 75g with my 1 albino and 1 copper tiger oscar. They r about 4" in size. I feed them live earthworm, bloodworm, ghost shrimp, I bought a tetrabit. Bt they didn't like it much. Thought of buy a hikari cichlid gold or bio gold. Foods r really essential to growing bt my question is that, is wc a vital aspect too for growing my oscars? Suggessions r most welcome.