I have a 10 gallon tank. I have one red swordtail, one platty, one blue gourami and one yoyo loach. I have 4 live plants. I would like to add one or two more fish to the tank. I have been told that dwarf gourami or cory cats might be good. I have also been told both of these would be a bad idea. So I am not sure what i should get. I would like a little color. Any suggestions would be great. Thanks.