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  1. Installation Manuals
  2. The Synergy Reef Shadow Overflow
  3. Drilling Your Aquarium

Drilling Return Holes

PreviousDrilling Your AquariumNextAttaching the Overflow to the Tank

Last updated 3 years ago

You will need to have return bulkheads in your aquarium for the return pump to flow water back into your aquarium. To drill these you will need the following.

Follow the Drilling Your Aquarium instructions for the drilling procedure.

Where you install them is up to you, but we recommend about 2" below the top of the aquarium.

https://synergyreef.com/product/3-4_bulkhead-fpt-slp/
https://synergyreef.com/product/35mm-diamond-holesaw-bit/