I have a 55 Gal tank currently stocked with 2 Green Terrors (1 inch each) as well as a common Pleco (2.5 Inches) I know these will be big fish with a heavy bioload. I have a Emperor 400 powerfilter (rated for 120 gallon tanks) so the filtration should be enough when they are bigger. My consern is while they are growing. Are there any common problems with an understocked tank? Currently there is 12.2 Gallons per inch of fish and 18.3 gallons per fish. Will this cause an imbalance?:joe: