What size bulkhead does this use for the hole on the aquarium itself? It states the drain bulkhead sizes but not sizes for the aquarium itself.

They provide hole saw to install overflow.

Is there anywhere i can find the mounting template for this overflow box? i’m trying to see if it’ll match the holes in a synergy reef shadow

I have not seen a template online. The holes on bottom fit 3/4" bulk heads and pvc. I believe the whole on the back with the mounting bulkhead is 1 3/8". My partner and I drilled our own hole for mounting based on the size of the bulkhead and hole on the back. The product does come with a glass cutting drill bit for making the correct size hole.

What is the size of the hole saw?

Not sure exactly size, I think its 2" however they do provide you with hole saw for the job.

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Fiji Cube Low Profile External Overflow Box (800 GPH)

Product ID: 183807248

Details

Brand
Fiji Cube
Color
Black
Item Weight
2.27 Kilograms
Material
Polyvinyl
Shape
Rectangular
Special Feature
Breathable

📏Slim & compact design

🔇Whisper-quiet water flow

🔧DIY installation kit included

Description

🌊 Elevate your aquarium game with silent, sleek, and smart overflow tech!

SILENT SERENITY - Front and back lid covers ensure whisper-quiet water flow for a peaceful aquatic environment.
EFFORTLESS UPKEEP - Detachable skimmer box makes cleaning a breeze—spend more time enjoying, less time maintaining.
ALL INCLUSIVE DIY KIT - Comes with template, diamond hole saw, and PVC pipe for emergency drain—install like a pro, no plumber needed.
SLEEK SPACE SAVVY DESIGN - Fits seamlessly into any modern aquarium setup without bulk.
VERSATILE OVERFLOW OPTIONS - Supports Herbie or Bean Animal style overflow for customizable, high-performance filtration.

The Fiji Cube Low Profile External Overflow Box delivers a powerful 800 GPH flow rate in a slim, modern design. Crafted from durable polyvinyl chloride, it features detachable skimmer boxes for easy maintenance and includes a full DIY installation kit with template, diamond hole saw, and emergency drain PVC pipe. Its quiet operation and compatibility with Herbie or Bean Animal overflow styles make it a top choice for professional-grade aquarium filtration.

Specifications

ASIN	B07TTYH7FH
ASIN	B07TTYH7FH
Additional Features	Breathable
Brand Name	Fiji Cube
Color	Black
Customer Reviews	4.4 4.4 out of 5 stars (22)
Date First Available	July 7, 2019
Global Trade Identification Number	00761856629813
Included Components	Front and back lid covers, template & diamond hole saw, PVC pipe for emergency drain installation
Item Shape	Rectangular
Item Type Name	Item
Item Weight	2.27 Kilograms
Item model number	367639
Manufacturer	Fiji Cube
Manufacturer	Fiji Cube
Manufacturer Part Number	367639
Material Type	Polyvinyl Chloride
Model Number	367639
Package Dimensions	10.43 x 10.2 x 7.87 inches; 5.01 Pounds
Product Style	Modern
Specific Uses For Product	aquarium for fish
Tank Volume	800 Gallons
Target Species	Fish
UPC	761856629813
Unit Count	1.0 Count
Vivarium Type	Aquarium

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