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
White
Material
Acrylic
Shape
Box
Specific Uses For Product
Indoor for
Style
Modern

📏Slim & compact design

🔇Quiet water flow system

🛠️DIY installation kit included

Description

🌊 Elevate your reef game with silent, sleek overflow perfection!

EFFORTLESS UPKEEP - Detachable skimmer box makes cleaning and maintenance a breeze.
SLEEK SPACE SAVVY - Slim profile fits seamlessly into any aquarium setup without bulk.
ALL INCLUSIVE DIY KIT - Comes with template, diamond hole saw, and PVC pipe for quick, professional installation.
WHISPER QUIET OPERATION - Front and back lid covers ensure near-silent water flow—no more noisy tanks.
VERSATILE OVERFLOW STYLES - Supports Herbie or Bean Animal overflow setups for customized water management.

The Fiji Cube Low Profile External Overflow Box delivers a powerful 800 GPH flow rate in a compact, modern design. Engineered for quiet operation with front and back lid covers, it includes a detachable skimmer box for easy maintenance and a full DIY installation kit. Compatible with Herbie and Bean Animal overflow styles, this overflow box is ideal for professional aquarists seeking efficient, noise-free water management in saltwater and reef tanks.

Specifications

ASIN	B07TTYH7FH
Additional Features	Breathable
Brand	Fiji Cube
Brand Name	Fiji Cube
Color	Black
Customer Reviews	4.4 out of 5 stars 22 Reviews
Global Trade Identification Number	00761856629813
Included Components	Front and back lid covers, template & diamond hole saw, PVC pipe for emergency drain installation
Item Type Name	Item
Item Weight	2.27 Kilograms
Manufacturer	Fiji Cube
Manufacturer Part Number	367639
Material	Polyvinyl Chloride
Material Type	Polyvinyl Chloride
Model Number	367639
Product Style	Modern
Special Feature	Breathable
Style	Modern
Tank Volume	800 Gallons
Target Species	Fish
UPC	761856629813
Unit Count	1.0 Count
Vivarium Type	Aquarium

Reviews

A**T

5.01.2020

C**.

1.02.2025

B**R

4.11.2025

A**R

29.05.2021

M**R

14.05.2025

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