---
product_id: 1343493
title: "TetraPond Submersible Flat Box Filter, For 250 To 500 Gallon Ponds"
price: "€ 87.11"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.fi/products/1343493-tetrapond-submersible-flat-box-filter-for-250-to-500-gallon
store_origin: FI
region: Finland
---

# Submersible design for max filtration Easy detach for quick cleaning Includes foam pads, tubing & fittings TetraPond Submersible Flat Box Filter, For 250 To 500 Gallon Ponds

**Price:** € 87.11
**Availability:** ✅ In Stock

## Summary

> 💦 Elevate your pond game—because clear water is the new status symbol!

## Quick Answers

- **What is this?** TetraPond Submersible Flat Box Filter, For 250 To 500 Gallon Ponds
- **How much does it cost?** € 87.11 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/1343493-tetrapond-submersible-flat-box-filter-for-250-to-500-gallon)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Plug & Play Setup:** Comes complete with tubing and three hose fittings for seamless integration with pumps from 200 to 2,000 GPH.
- • **Maintenance Made Simple:** Quick-detach design lets you clean and refresh your filter in minutes—no hassle, no downtime.
- • **Built for Medium-Sized Oasis:** Optimized for ponds between 250 to 500 gallons, perfect for your backyard sanctuary.
- • **Trusted Durability & Warranty:** Crafted from rugged materials with a 1-year limited warranty to keep your pond thriving worry-free.
- • **Crystal Clear Ponds, Effortlessly:** Keeps pond water pristine by preventing pump clogging with dual coarse & fine foam filtration.

## Overview

The TetraPond Submersible Flat Box Filter is a durable, easy-to-install filtration system designed for ponds up to 500 gallons. Featuring submersible construction, included coarse and fine foam pads, tubing, and fittings, it prevents pump clogging and maintains crystal-clear water. Its quick-detach design simplifies maintenance, backed by a 1-year limited warranty, making it an essential upgrade for any pond enthusiast seeking reliable, efficient water clarity.

## Description

The TetraPond® Submersible Flat Box Filter is designed to keep ponds clean and keep pond and fountain pumps from clogging with debris. It includes everything you need for setup, including a flat filter box with filter-to-hose fitting, coarse and fine foam pads, 1-inch tubing and three fittings for attaching hose to various pump inlets. The TetraPond Submersible Flat Box Filter is easy to detach for cleaning and includes a 1-year limited warranty (see product packaging for details). This reliable filter is ideal for ponds up to 500 gallons and fits a wide variety of pumps, from 200 GPH to 2,000 GPH. Replacement foam is also available (sold separately). Make sure your filtration system is correctly sized for your pond. If you don’t know the volume of your pond, follow this simple formula: To measure your pond volume (in cubic feet), calculate length x width x average depth; multiply the total pond volume by 7.8 to calculate the number of gallons. Since 1951, Tetra has developed the world’s most comprehensive body of fish food knowledge, and fishkeeping enthusiasts have looked to the brand for products and solutions that add ease and beauty to their home. Whether you're an experienced hobbyist or just starting out, Tetra has everything you need – from a large variety of quality fish food and innovative equipment to test kits and decor.

Review: AS DESCRIBED, AS EXPECTED. This is a Filter Box only - So I've had this Filter Box in use for the past 5 months. No issues, No problems. Works great. Now ordering a second due to an additional pond project in the works. Having seen several negative reviews recently dated stating "false advertisement" or "no filter included", I had the need to set this product straight. This titled item clearly says, "Submersible Flat Box Filter" so I"m not sure where buyers are confused about a missing filter? I have my product instructions, as one recent reviewer referenced with his negative "false advertising" video...and yes the instructions clearly show HOW TO SET UP this filter box WITH a TETRA filter. NO, it does not say "filter included". As the product details also show and state, what additional pieces are needed for this FILTER BOX operation, I just don't see how buyers are confused. The Tetra filter noted in the set up instructions, is NOT a filter requirement for this box, only a suggestion. As for the FILTER BOX, this item was received and functions as described. It's a two piece plastic box; slotted-holes lid and non slotted bottom tray, which incases a textured rough "green scrubby" type of filter screen that lays inside this box. That's it. Yes I found and was aware from my research, that this filter box lid will have a tendency to lift off, due to it's light weight. And as others noted, just place a rock/brick on top of the lid to weigh it down. I did choose the smallest and heaviest sized rock available to minimize the filter vent coverage which the rock will prevent particulates from passing through to the inside of the box. As long as you don't cover more than half the lid openings, your filter should operate as described. This FILTER BOX has been very effective in collecting the water debris inside the filter screen and also has protected my water filter - bought separately - from getting clogged. Maintenance and cleaning of this box is simple. Detach the outlet hose from the box. Remove the box entirely, remove the filter screen, rinse and scrub box as needed for algae removal. Reassemble. Replace box and screen and reattach the filter hose/line to restart the suction. *Add heavy object rock/decor/flower pot to top of box to secure lid in place from lifting off. Also, best to turn off the water pump while performing this maintenance so as to avoid unfiltered/unscreened water being sucked through your water pump and lines. Would I recommend this product? *Yes. This is a simple easy Filter Box set up for your small pond and is effective when used and cleaned correctly. *However, it can also be a great DIY reference/example to make-your-own version, if you are the DIY type. I personally didn't have the time to seek out the materials and opt for this kit with all the parts needed to get this going within 10 minutes of delivery. For reference; I have a 220 gallon metal water trough and using this Filter Box inside it. My trough is a small fish pond with plants. My research did find horse owners using this Filter Box in their water troughs to help keep the drinking water debris free. I don't see why this wouldn't work for that purpose also. No chemicals are required with this box use. Just keep in mind that this Filter Box will require a water pump no matter how you intend to use this Box - so that water is sucked through the Box, through the filter screen and emits debris- free water through the pump. Hope this helps and clarifies this product, it's use and what comes with it.
Review: Hmmmmm....waterfall - The TetraPond Submersible Flat Box Filter is a great option for those who want to keep their pond water clean and clear. Here are some of the key features and benefits of this product: Suitable for ponds from 250 to 500 gallons: This filter is designed to work with medium-sized ponds, making it a great option for many backyard water features. Submersible design: The TetraPond Flat Box Filter is designed to be fully submerged in your pond. This allows for maximum filtration efficiency and helps to keep your pond water clear. Mechanical and biological filtration: This filter uses both mechanical and biological filtration to remove debris and harmful bacteria from your pond water. The mechanical filter sponge captures large debris while the bio-filter balls help to break down harmful toxins. Easy to install: The TetraPond Flat Box Filter comes with everything you need to install it in your pond, including tubing and fittings. It also includes a locking handle to make it easy to remove the filter for cleaning. Durable construction: This filter is made from high-quality materials that are designed to withstand the rigors of outdoor use. It is built to last and should provide many years of reliable performance. Overall, the TetraPond Submersible Flat Box Filter is a great option for those who want to keep their pond water clean and healthy. It is easy to install, efficient, and durable, making it a smart choice for many pond owners.

## Features

- SUBMERSIBLE FILTER: Flat box filter prevents pump from clogging and keeps pond water clear and clean.
- PARTS INCLUDED: Coarse and fine foam pads, tubing and three hose fittings.
- CONVENIENT: Attach to various pump inlets – easy to detach for cleaning.
- WARRANTY: Includes a 1-year limited warranty – see product packaging for details.
- USAGE: Ideal for use with ponds up to 500 gallons.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Customer Reviews | 4.3 out of 5 stars 4,266 Reviews |

## Images

![TetraPond Submersible Flat Box Filter, For 250 To 500 Gallon Ponds - Image 1](https://m.media-amazon.com/images/I/61WoCUvNj8S.jpg)

## Questions & Answers

**Q: Can you use this without a pump?**
A: No, a pump is needed

**Q: Does anyone use JUST THIS with their pump and NO biological pressure filter?  I'm curious about the results.**
A: This is just the filter that I bought and I attached it to a normal submersible pump. The filter works really well.

**Q: is the pump included?**
A: No, this is just the filter box prefilter system. Tetra does offer two kits with this filter and a submersible pump, but they are listed separately from this unit and sell for about $ 60 to $115

**Q: which filter fits this sumersible flat box filter the won we have its a tetra 325**
A: You can purchase the replacement pads for it on the Tetra website or through a local store. Amazon does not carry them.

## Customer Reviews

### ⭐⭐⭐⭐⭐ AS DESCRIBED, AS EXPECTED. This is a Filter Box only
*by G***Y on April 5, 2021*

So I've had this Filter Box in use for the past 5 months. No issues, No problems. Works great. Now ordering a second due to an additional pond project in the works. Having seen several negative reviews recently dated stating "false advertisement" or "no filter included", I had the need to set this product straight. This titled item clearly says, "Submersible Flat Box Filter" so I"m not sure where buyers are confused about a missing filter? I have my product instructions, as one recent reviewer referenced with his negative "false advertising" video...and yes the instructions clearly show HOW TO SET UP this filter box WITH a TETRA filter. NO, it does not say "filter included". As the product details also show and state, what additional pieces are needed for this FILTER BOX operation, I just don't see how buyers are confused. The Tetra filter noted in the set up instructions, is NOT a filter requirement for this box, only a suggestion. As for the FILTER BOX, this item was received and functions as described. It's a two piece plastic box; slotted-holes lid and non slotted bottom tray, which incases a textured rough "green scrubby" type of filter screen that lays inside this box. That's it. Yes I found and was aware from my research, that this filter box lid will have a tendency to lift off, due to it's light weight. And as others noted, just place a rock/brick on top of the lid to weigh it down. I did choose the smallest and heaviest sized rock available to minimize the filter vent coverage which the rock will prevent particulates from passing through to the inside of the box. As long as you don't cover more than half the lid openings, your filter should operate as described. This FILTER BOX has been very effective in collecting the water debris inside the filter screen and also has protected my water filter - bought separately - from getting clogged. Maintenance and cleaning of this box is simple. Detach the outlet hose from the box. Remove the box entirely, remove the filter screen, rinse and scrub box as needed for algae removal. Reassemble. Replace box and screen and reattach the filter hose/line to restart the suction. *Add heavy object rock/decor/flower pot to top of box to secure lid in place from lifting off. Also, best to turn off the water pump while performing this maintenance so as to avoid unfiltered/unscreened water being sucked through your water pump and lines. Would I recommend this product? *Yes. This is a simple easy Filter Box set up for your small pond and is effective when used and cleaned correctly. *However, it can also be a great DIY reference/example to make-your-own version, if you are the DIY type. I personally didn't have the time to seek out the materials and opt for this kit with all the parts needed to get this going within 10 minutes of delivery. For reference; I have a 220 gallon metal water trough and using this Filter Box inside it. My trough is a small fish pond with plants. My research did find horse owners using this Filter Box in their water troughs to help keep the drinking water debris free. I don't see why this wouldn't work for that purpose also. No chemicals are required with this box use. Just keep in mind that this Filter Box will require a water pump no matter how you intend to use this Box - so that water is sucked through the Box, through the filter screen and emits debris- free water through the pump. Hope this helps and clarifies this product, it's use and what comes with it.

### ⭐⭐⭐⭐⭐ Hmmmmm....waterfall
*by 1***1 on April 12, 2023*

The TetraPond Submersible Flat Box Filter is a great option for those who want to keep their pond water clean and clear. Here are some of the key features and benefits of this product: Suitable for ponds from 250 to 500 gallons: This filter is designed to work with medium-sized ponds, making it a great option for many backyard water features. Submersible design: The TetraPond Flat Box Filter is designed to be fully submerged in your pond. This allows for maximum filtration efficiency and helps to keep your pond water clear. Mechanical and biological filtration: This filter uses both mechanical and biological filtration to remove debris and harmful bacteria from your pond water. The mechanical filter sponge captures large debris while the bio-filter balls help to break down harmful toxins. Easy to install: The TetraPond Flat Box Filter comes with everything you need to install it in your pond, including tubing and fittings. It also includes a locking handle to make it easy to remove the filter for cleaning. Durable construction: This filter is made from high-quality materials that are designed to withstand the rigors of outdoor use. It is built to last and should provide many years of reliable performance. Overall, the TetraPond Submersible Flat Box Filter is a great option for those who want to keep their pond water clean and healthy. It is easy to install, efficient, and durable, making it a smart choice for many pond owners.

### ⭐⭐⭐⭐ Works great
*by D***E on July 3, 2020*

I wasn't able to find replacement foam elements for my old round bucket-style filter anywhere, so I decided to buy a new filter. I was a little concerned by some of the reviews on this one regarding the coarseness of the "fine" element, and when I opened the package I saw the reason for these reviews. The coarse element looks pretty much the same as every other coarse foam element I've seen, but the blue "fine" element also appeared quite coarse, only slightly finer than the black coarse element. Well, I had it, and the old filter was pretty much worn out, so I decided to give it a try. For $17.99 I really didn't have much to lose. Heck, the whole filter box with the foam elements included cost about half what I had to pay for replacement elements for my old filter when I was still able to find them. DO NOT be concerned that the fine filter element is too coarse. What I've discovered is that since it is more coarse it doesn't completely clog up with the slime and silt out of my pond, so water continues to pass through and get filtered even when it is very heavily loaded with crud. My old filter used to move less and less water as it clogged until it would finally slow to just a drip. This one just keeps happily filtering water. It's removing MORE crud than the old one did. Noticeably more. The water stays clearer, and when I pull it out to clean it the filter elements are loaded with a lot more filth than I ever experienced with the my old filter. Also, because the fine filter is not as fine it is MUCH easier to clean out. I just have to hose it off, dunk it in a bucket of water a few times, and shake it out, and it comes out looking almost as clean as new. Nice! 5 stars for function. 4 stars for everything else because I can't speak for the durability yet, and the snap together design gives me a little concern that it might be a bit on the fragile side. Take care when removing the cover. There's one wide clip that holds it together, and that you press in to release one end of the cover. Once released, gently slide toward the end you just released to release the 2 clips on the other end. Don't just pop one end lose and yank upward. It feels like those little clips might be prone to breaking if you're rough with it. Bottom line, for an inexpensive filter this one works great, and replacement elements seem to be fairly readily available for it.

## Frequently Bought Together

- TetraPond Submersible Flat Box Filter, For 250 To 500 Gallon Ponds
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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-13*