Okay... I have a 5,000 gallon outside KOI pond... I leave most of my fish outside for the winter... I just bought some KOI from japan that are 6" and wanted to bring them in for the winter so I could still feed them and watch them ( these koi are 100$ a pop ) So right now I have a 55 gallon tank with ( 2 Powerhead with Quick Filters and using a whisper with Super Porous Ceramic Media, also 2 airstones for oxygen ) I have 2 plants in there now to cycle the tank. Does this stepup seem like it will work for my 2 koi...