Originally Posted by Craigy
Hi I was wondering if a red tail black shark would be ok to go in with 4 zebra danios and 3 phantom tetras?
As already mentioned, RTS's become very territorially aggressive as they mature and, despite literature, it's not relegated just to fish that resemble them. I recommend a 75gal at minimum with plenty of decor, DW, plants and caves to help establish territories for it to claim.
Their territorial aggression (a polite way of saying nasty attitude) can extend to an entire tank ... so even large tanks are no guarantee.
But hey ... they are pretty fish!
75g Planted Barbs Denison, BlackRuby, Tiger, Albino Tiger, Green Tiger, Cherry, Gold, Checkered, Odessa.
NonBarbs Cardinal, Neon, RummyNose, Bloodfin Tetras, Z. Danios. 1RTS. Amano, Bamboo, Ghost & RCS. 20g Long Shrimp Tank RCS, Tiger, Amano.