hey guys i just got a 120 gallon fish tank with an emperor 400 and an oddysea cfs 4 filters a penguin 660 power head and a hydor 400 watt heater. Also came with a pine stand lid/lights. all for 100 bucks! And its almost brand new. So right now in my 55 i have one leopard sailfin pleco tiger oscar and 5 silver dollars that will be transferred into this tank pleco is about 7'' same with the oscar the silver dollars are fairly small. So what im wondering is what other fish would be cool for this tank? I want your opinions maybe a knife or a flagtail? you tell me thanks!