Pick three fish and go with that instead, any more and you will need some great filtration or tons of water changes. Flame angel is too large and active and pipefish are best for species only tanks, they are specialized feeders and not easy to keep. I would get a firefish, shrimp goby w/ shrimp and 1 clown. Clowns are cute but getting one lets you get a different fish instead and they aren't big swimmers, kinda boring.