---
product_id: 168222053
title: "Low Profile External Overflow Box (400 GPH)"
brand: "fiji cube"
price: "S$266"
currency: SGD
in_stock: true
reviews_count: 8
url: https://www.desertcart.sg/products/168222053-low-profile-external-overflow-box-400-gph
store_origin: SG
region: Singapore
---

# 400 GPH flow rate Ultra-quiet operation DIY installation kit Low Profile External Overflow Box (400 GPH)

**Brand:** fiji cube
**Price:** S$266
**Availability:** ✅ In Stock

## Summary

> 🌊 Dive into tranquility with our Low Profile Overflow Box!

## Quick Answers

- **What is this?** Low Profile External Overflow Box (400 GPH) by fiji cube
- **How much does it cost?** S$266 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/168222053-low-profile-external-overflow-box-400-gph)

## Best For

- fiji cube enthusiasts

## Why This Product

- Trusted fiji cube brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Sleek & Space-Saving:** Designed to fit seamlessly into any aquarium setup.
- • **Whisper-Quiet Design:** Enjoy a tranquil aquatic environment with minimal noise.
- • **Effortless Maintenance:** Detachable skimmer box for quick and easy cleaning.
- • **DIY-Friendly Installation:** Comes with a template and diamond hole saw for hassle-free setup.
- • **Versatile Overflow Options:** Supports both Herbie and Bean Animal overflow styles for customizable performance.

## Overview

The Low Profile External Overflow Box (400 GPH) is a compact and efficient aquarium overflow system designed for easy maintenance and quiet operation. It includes a DIY installation kit and supports multiple overflow styles, making it a versatile choice for any fish enthusiast.

## Description

Full description not available

## Features

- SLIM AND COMPACT to suit any aquarium setup
- EASY MAINTENANCE with detachable skimmer box
- QUIET water flow with front and back lid covers
- DIY INSTALLATION with template & diamond hole saw included, PVC pipe included for emergency drain installation
- Herbie Style or Bean Animal Style overflow (Bean Animal Overflow on selected models) achievable

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Specific Uses For Product | Aquarium overflow system |
| Vivarium Type | Aquarium |
| Additional Features | Lightweight |
| Target Species | Fish |
| Style Name | Modern |
| Color | Black |
| Item Shape | Box |
| Material Type | Polyvinyl Chloride |

## Product Details

- **Brand:** Fiji Cube
- **Material:** Acrylic
- **Special Feature:** Lightweight
- **Style:** Modern
- **Color:** Black
- **Included Components:** Front and back lid covers, template & diamond hole saw for DIY installation, PVC pipe for emergency drain installation, Entire skimmer box
- **UPC:** 761856629790
- **Vivarium Type:** Aquarium
- **Global Trade Identification Number:** 00761856629790
- **Manufacturer:** Fiji Cube

## Images

![Low Profile External Overflow Box (400 GPH) - Image 1](https://m.media-amazon.com/images/I/61QEN9IgKFL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: 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.**
A: They provide hole saw to install overflow.

**Q: 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**
A: 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.

**Q: What is the size of the hole saw?**
A: Not sure exactly size, I think its 2" however they do provide you with hole saw for the job.

**Q: Will the 2400gph model work on 3/4 inch thick tank walls?**
A: Yes it'll definitely fit

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent product
*by L***T on February 19, 2021*

I find fijicube doesn't get enough recognition for what they provide to the reefing hobby. This is another great product, really enjoy the design of the slim profile overflow. Everything is provided for drilling. They provide a high quality drill bit with package which made it a breeze during drilling process. I will continue to do business with this company.

### ⭐⭐⭐⭐⭐ Works great
*by A***R on July 7, 2022*

Solid construction, well packaged, great product. I used the hole saw provided and it worked without issue. I will say when working with this type of hole saw it’s important to check that it’s not crooked/wobbly in the drill. The template was easy to use and everything fit very nicely.

### ⭐⭐⭐ For Rimmed Tank Owners!!!
*by C***. on February 1, 2025*

You will need an extra gasket for rimmed tanks and will more than likely need to file down the intake baffles if you want the water level above the top rim. Wish I knew that before, so I'm sharing it here. I installed on a 60 gallon breeder. Took the adjustments mentioned, but it works great as intended. Used the Mill to take off roughly 1/3 of an inch and it sits flush against the top trim, and I cannot put the cover on the intake.3 star because this was defintely an oversight by Fiji or something they could communicate more in the listing.

## Frequently Bought Together

- Fiji Cube Low Profile External Overflow Box (400 GPH)
- Reefing Art Ceramic Bio Filter Media Vast Surface Area for Aquarium Sump Canister (1 Box / 24 pcs)
- Salinity Refractometer for Seawater and Marine Fishkeeping Aquarium 0-100 PPT with Automatic Temperature Compensation

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**Shop now:** [https://www.desertcart.sg/products/168222053-low-profile-external-overflow-box-400-gph](https://www.desertcart.sg/products/168222053-low-profile-external-overflow-box-400-gph)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-03-18*