Currently in my 14G is 2 flame dwarf gouramis and 2 mickey mouse platys and one goldfish. I plan on taking the goldfish out soon as its getting its own tank again. With the 4 other fish in there. How many more fish can I add to the tank? Im wanting to add 2 emerald or albino cory catfish or maybe 2 angels. Would that be safe or should I stick to adding the 2 cory catfish and leave it at that?