I'm having trouble as to what I can stock in my 29g (30" x 12" x 18"). It has a Penguin 200 and water was treated with Jungle Water Safe Plus and Jungle Aquarium Salt. I had 6 Danios in it, but they moved to my 10g and would like to do something different with this one. I really would like to do Gouramis or Cichlid, but any help on stocking it is helpful.