hi guys, im now having a 2 feet tank. everything is stable now running on 1 protin skimmer (weipro 2011) i think is this model but i know the one i get is enough for 2 ft alr, undergravel filter connected to a hangover filter. so im thinking of adding a sum tank so can anyone give me advice should i do a sum tank for just a 2ft tank? another doubt would be if i run a sum tank, if there is a power shortage in the house would the sum tank cause any flooding as there is no power to power the pumps?