Marine Depot Elite OverFlow Box w/ Holesaw Drill Bit – Large Only 6 left – order now! In Stock


SKU: MD5503 Category:


Ready to upgrade your filtration? The Elite Overflow Box will open up a whole new world of filtration for your glass or acrylic aquarium.

The Marine Depot Elite Overflow Box is a high quality and economical overflow box that allows you to easily add a sump, refugium or wet/dry filter to your aquarium filtration system. These overflow boxes allow you to skim water from the surface of the aquarium and deliver it to your external filter without the need of expensive modifications to your aquarium.

The Elite Overflow is a slim black box minimalist design, allowing more room in the aquarium for aquascaping and swim room for your livestock.  The Elite will also effectively transport water to your sump with as little noise as possible.

This DIY (Do-It-Yourself) project is a plug and play overflow system with a simple installation procedure; however, we recommend that any drilling and installation be performed by a professional maintenance servicer.


  • (1) Black Wetside Box 
  • (1) Clear Dryside Box
  • (1) Template
  • (1) White Safety PVC
  • (1) Holesaw (60mm Diamond Coated Holesaw)
  • (2) 1.5″ Bulkhead
  • (2) 1″ Bulkhead for Small & Medium Elite Models
  • (3) 1″ Bulkhead for Large Elite Models
  • (1) Black Cover Lid


  • Rated for aquariums up to 200 gallons
  • Internal Dimensions: 12″L x 1.25″W x 6″H
  • External Dimensions: 12″L x 3″W x 6″H
  • Suitable for tanks up to 5/8″ thick


Aquarium RatingInternal Box
Dimensions (LxWxH)
External Box
Dimensions (LxWxH)
Drain Bulkheads
(Count x Size)

Elite Small

up to 90 gallons6″ x 1.25″ x 6″6″ x 3″ x 6″2 x 1″

Elite Medium

up to 150 gallons8″ x 1.25″ x 6″8″ x 3″ x 6″2 x 1″

Elite Large

up to 200 gallons12″ x 1.25″ x 6″12″ x 3″ x 6″3 x 1″