gallery Making the Cage Nets We use 16ft 2″ poles to make the frame of the cages. We therefore make the nets 16ft by 16ft wide. . Cages on the damn 16ft by 16ft wide cages . Restocking 8000 catfish fingerlins. 2000 Catfish fingerlins awaiting transfer to the concrete ponds . Tank Cleaning Its important that the concrete ponds are cleaned thoroughly prior to restocking. Alum salts and lime being used as the cleaning agent .