Evolution Aqua 1.5" Single Union Ball Valve Dry If using standard bed mattress

If using standard bed mattress

and Fish are not included in the package

The Hartford mailbox post with base trim can be combined with one of four mailboxes

making it suitable for fish and other normal aquatic life

Maintain for Ponds: Reduces maintenance

Evolution Aqua 1.5" Single Union Ball Valve Dry If using standard bed mattressBall valves are helpful when trying to regulate pump flow or temporarily restrict flow to work on a pump or filter. They allow you to stop back flow completely while disengaging your pump, or to throttle your flow rate down, or direct water through specific lines. Always restrict the flow at the line discharge and never directly at the pump or on the intake side.