Hello.I am redoing my 30 gallon freshwater and have only 3 goldfish in it so far. I am looking to do albino and peppered corries. How many cory's should I do in this tank? Would it be too much to have 3 of each cory for a total of 6? should i just do 6 peppered or albino instead? I wouldnt mind doing a variety of corys..I wanted to get some feedback before I bought them.thanks..Merry Christmas as well to everyone.