I read that the Dwarf Gourami's maximum length is 2". I just got two Cobra Dwarf Gourami's and one of them is 3" long. Will they get any bigger? Also, any personal experiences that anyone has had with this breed (good or bad) would be helpful. I have mine in a 20 gallon tank with two Dalmation Mollies, two Black Skirt Tetras and a small Plecko.