i would love that but i dont have space for another tank right now. the 20gal is only empty so im thinking of stocking it. i never had a tang before. i keep a CA tank, a SA tank and an asian aro tank. but never a tang tank. maybe i rearrange things up in the house and try to fit in a 75gal for tangsDJRansome said:Go for a 30" tank minimum for a pair of calvus, and I prefer even a 36" tank.