Hello,

I was wondering if for a 10 gallon (US) aquarium do I have too many fish? They are 5 black neon tetras, 4 serpae tetras, 4 white clouds, and 2 corydoras. I also have 5 ghost shrimp and one 3 inch crayfish. I would like to get a few more corydoras. Perhaps going up to a 30 gallon would be ...