Pond Boss Forums STOCKING A NEW POND Raising Forage and Bait Raising Minnows and Bluegill in tanks

Sorry no link just experience with large aquariums. You should be able to check under gravel filters for aquariums. One bit of advice would be to place screen material about a inch below the top of the gravel layer to keep them from digging down through the gravel thus allowing the water to be pulled up and not have to flow through the gravel filter layer.