Ken,
If you have fine enough screen to keep the fish in over your overflow a regular sump pump in a bucket placed in a pond that pumps water into the circular tank and an overflow will work for a simple flow through system. When I get time I will post a pic of one of my tanks I use to hold fish when I'm seining the pond.
You can still use the stand pipe to periodically flush out waste by lifting one of two stand pipes. (A smaller pipe inside a larger one.)
Last edited by Cecil Baird1; 05/25/12 07:51 AM.
