Sandman I have two small fish boxes that drain but no pump and one very large box under deck that has no fill but a sealand 12v sanipump that can take solids up to 1/2". This came set up this way and it has never clogged. Boat U.S. had them in the catalog at 304.99
oke: but this has been a great pump. I have run it in the winter after freeze up and it had frooze but it still worked .