So I'm building a stingray tank. It will probably house 3 tiny stingrays, until they get untiny. Then once they've grown out they are going to a breeder. This said tank will be 6' by 2.5' and about 2' tall, and it'll be about 270 gallons. I don't recall if we counted the sump or not. With these rays I plan to keep 2 bichirs (one for sure senegal), a moonlight gourami (unless it gets picked on, then it'll be back to the 44 gal for that one) and I was thinking of ID sharks. So my question is will about 5 be alright in this setup?