I have a 125 with 1 TSN (8 inches); frontosa (8 inches); red parrot (5 inches); 2 gold severums (6 inches)...I'm looking to add a tank mate to these guys. Any ideas of compatible tankmates? Also, looking for fish that are great in size/color. I'm adding a 300 gallon shortly which I'm in the process of cleaning. Pictures would be great.