Since the cories decided it was time to start making little cories all over the place I'm going to set up a 10 gal tank for fry rearing. Sandy bottom, a few anubias and some flower pots as caves. When the fry grow up and get moved assuming the cories don't make more, will the filter be fine and stay cycled with an empty tank or will the bacteria die off? There's gunna be an airstone in there and a plant so if the filter was moved to another tank would the tank get kinda gross, or would the air stone keep the tank from stagnating?