AquaDyne Heavy Duty RHINO I Overflow or Side Wall Returns Size:4" Bottom Drain Maximum recommended air flow:

Maximum recommended air flow:

medium or large bodies of water

Using a similar formula to Pond-Vive dry powder

converting ammonia and nitrites into nitrates

marigold meal

AquaDyne Heavy Duty RHINO I Overflow or Side Wall Returns Size:4" Bottom Drain Maximum recommended air flow:The Rhino I Overflow or Side Wall Bottom Drain is heavy duty, Schedule 80 PVC drain. It can be used as an overflow bottom drain (when used together with vertical riser) or as a sidewall return. All Rhino drains can be installed with extreme confidence in any application by beginners and experts alike. Compare the engineering of Rhino bottom drains to any on the market, and you will see the evident quality. Rhino I Features: Thicker flanges and liner