My display tank has been up for about a month. I have a hang-in filter that came with my aquarium kit that I've never used. I have only live rock/sand and a powerhead in my display tank. If I wanted to seed/cycle the filter sponge for use in a new quarentine tank, how long would I need to put it in the display tank? Can I just set the filter sponge in the tank or do I need to actually run the filter. Or won't this work for some reason?



