Many pond builders have found that adding a bottom drain helps keep a pond cleaner. Fish waste and other muck that accumulates on a pond bottom can be easily removed by a bottom drain. Ponds that are over 2' deep can become stagnant without a bottom drain.
BDK3A - EasyPro 3" Bottom Drain Kit (EBD4A drain) w/ Air Diffuser Includes 3" Fittings (MPN BDK3A)
$295.99 $245.67 | 614 Points