They are compatible, and will spruce up the tank a bit because they're active little shoaling fish. Some people do keep Red Tailed Black Sharks or Rainbow Sharks with Convicts in tanks like a 30 gallon. But there's this whole debate thing about whether those Sharks are okay in a 30 gallon long tank OR in need of a 55 gallon tank.
It's really a never ending topic. I know people who are housing a Convict, a Rainbow Shark, and 6 Tiger Barbs in a 30 gallon without any problems. It's a planted tank with many nooks, crannies, and caves.
Yes Tiger Barbs and snails-but those arn't fish.. idk if angelfish would work with the convict..
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