I have a 50 gallon reef tank with no sump. My current stock list is Mandarin dragonet Starry Blenny 2 bangaii cardinalfish I plan to get a Snowflake Clown Flashers wrasse A coral beauty. I also wanted to get 3 green chromis. Is that to many fish? I don't want have to do a water change more than twice a month. I can leave out the chromis but I want them if it is not to much of a bio load. I will also plan to have a clean up crew 2 Conch Snails 4 turbo snail I also want to have 2 cleaner Shrimp. Is this to much? Would this stock list work out. If I do get chromis I want at least three no less.