Is one bonded pair of earth eaters and the tiger silver dollars and the snowball plecos and Severum okay for a few years before I'd upgrade, it'll only be about 3-5 years depends. And doesn't every fish have an adult size and max size?Your tank isn't 3ven big enough for your 4 daemons without tankmates. You can keep a bonded pair of them with one chalceus and one striped rafael. That's max and it's assuming it's a bonded pair of daemon.