---
product_id: 218013253
title: "Premium Under Gravel Filter System-For 29 Gallon Fish Tanks&Aquariums"
brand: "penn-plax"
price: "$309.59"
currency: USD
in_stock: true
url: https://www.desertcart.ec/products/218013253-premium-under-gravel-filter-system-for-29-gallon-fish-tanks
store_origin: EC
region: Ecuador
---

# Air-driven filtration system Under gravel biological filtration Activated carbon chemical filtration Premium Under Gravel Filter System-For 29 Gallon Fish Tanks&Aquariums

**Brand:** penn-plax
**Price:** $309.59
**Availability:** ✅ In Stock

## Summary

> 🪸 Elevate your aquarium game with the timeless, crystal-clear power of Penn-Plax’s premium under gravel filter!

## Quick Answers

- **What is this?** Premium Under Gravel Filter System-For 29 Gallon Fish Tanks&Aquariums by penn-plax
- **How much does it cost?** $309.59 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/218013253-premium-under-gravel-filter-system-for-29-gallon-fish-tanks)

## Best For

- penn-plax enthusiasts

## Why This Product

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

## Key Features

- • **Dual Functionality:** Filters and aerates simultaneously—your aquarium’s ultimate air & water purifier in one sleek system.
- • **Effortless Clarity:** Air pump-powered design means fewer moving parts for ultra-low maintenance and crystal-clear water.
- • **Complete Setup Included:** Everything you need except the air pump—filter plates, lift tubes, airline tubes, connectors, and activated carbon cartridges.
- • **Triple-Action Filtration:** Biological, chemical, and physical filtration work in harmony to keep your tank pristine and healthy.
- • **Custom Fit for 20-29 Gallon Tanks:** Adjustable lift tubes and filter plates perfectly sized for popular mid-sized aquariums.

## Overview

The Penn-Plax Premium Under Gravel Filter System is an air-driven filtration solution designed for 20 to 29 gallon freshwater and saltwater aquariums. It combines biological, chemical, and physical filtration by cycling water through gravel and activated carbon cartridges, while simultaneously aerating the tank. The system includes adjustable lift tubes, filter plates, airline tubes, connectors, and replaceable carbon media, offering a low-maintenance, efficient, and neat filtration setup made in the USA.

## Description

Penn-Plax Premium Under Gravel Filter System-For 29 Gallon Fish Tanks&Aquariums

## Features

- NOTHING LIKE OLD SCHOOL: The Clear-Free Premium Under Gravel Filter is air driven and utilizes an Air Pump (not included) to cycle crystal clear water throughout your aquarium, while keeping a crisp and neat look inside. This means there’s less “moving parts,” making for simplistic and easy maintenance. This filter is suitable for most 20 (long) – 29 gallon aquariums.
- BIOLOGICAL, CHEMICAL, AND PHYSICAL FILTRATION: As air is pushed through the Air Stones and rises through the Lift Tubes, water is gently suctioned through gravel and the filter plates, allowing both air and water to pass through the Filt-a-Carb Activated Carbon Cartridges. When water continues to be drawn through, anaerobic bacteria collects and colonizes within the gravel and filter plates.
- ALSO AERATES YOUR TANK: Since the Clear-Free Premium Under Gravel Filter is air driven through the use of Air Stones and an Air Pump (not included), it also aerates your tank. In essence, your aquarium is being filtered and aerated at the same time, though the same system. It’s a filter and bubbler in 1.
- ITEMS INCLUDED: The Clear-Free Premium Under Gravel Filter includes 2 Filter Plates, 2 Adjustable Lift Tubes, 2 Straight Airline Tubes, 3 Filter Plate Connecters, and 2 Replaceable Filt-a-Carb Activated Carbon Media Cartridges.
- MEASUREMENTS: Each Filter Plate Separately = 14” (W) x 11.1” (D) / Filter Plates Together = 28” (W) x 11.1” (D) / Each Lift Tube at Filter Plate Base = 13” – 16”

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Penn Plax, INC. |
| Country of Origin | USA |
| Item model number | CFU29 |
| Product Dimensions | 71.12 x 28.19 x 43.18 cm; 566.99 g |
| ASIN | B005Q4900Q |

## Images

![Premium Under Gravel Filter System-For 29 Gallon Fish Tanks&Aquariums - Image 1](https://m.media-amazon.com/images/I/91kXCC+rZoL.jpg)

## Questions & Answers

**Q: does this filter come with everything it needs to be put in aquarium or do i need additional items?**
A: You will need an air pump and 2 way gang valve to regulate the air. The good thing about these filters are almost no maintenance. If you do decide to use a power head, choose carefully. Some power heads may be to disruptive to the fish. If you decide to get smaller fish I personally would not use a power head. Stronger fish can swim against the current that a power head can produce. I hope this helps more than confuse. Oh, and one more thing...this may be a no-brainer...gravel designed for aquariums.

**Q: can this be used alone for my 29 gallon tank? i don’t like the noise of a hang over filter and i can’t use an internal filter bc of the flow strength**
A: Yes, I have a 29 gallon tank and this is the only filter I use. The water is sparkling clean, really like this.

**Q: My aquarium dimensions are 35” x 17”. Wich model is recommended?**
A: Doesn't look like they make one specifically for that size aquarium base. However, you may be able to purchase two units (packages) of the 20L/29 gal. size or the15/20H gal. size and snap the plates together. You may end-up with an extra plate when you're finished, but that's no big deal. Look at the sizes of each of these and figure out which combination would best cover the bottom of your tank. Good luck.

**Q: On my 29 gal bowfront, This filter is just a tad too wide at the front (left & right). Is it possible to trim the 2 corners and still work properly?**
A: The filter tubes can be cut down, so they fit properly. If you plan on trimming it because it is too wide, I suggest trimming only the front corners. I would make a template by setting the aquarium on top of the plate, so you get a good idea of how much to cut or trim off.  Be sure to sand the ruff edges Please note I also use graven for mine which does cover the plate before I add my water. It will still work fine as a bit of gravel gets down around the edges anyway! Good luck and enjoy.

## Frequently Bought Together

- Penn-Plax Undergravel Aquarium Filter for 20 (Long) - 29 Gallon Tanks – Two 14” x 11.1” Plates – Under Gravel System for Clear, Clean Water – Safe for Freshwater and Saltwater Tanks
- PENN-PLAX Standard Airline Tubing for Aquariums – Clear and Flexible – Resists Kinking – Safe for Freshwater and Saltwater Fish Tanks – 8 Feet
- Tetra Whisper Easy to Use Air Pump for Aquariums (Non-UL)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.ec/products/218013253-premium-under-gravel-filter-system-for-29-gallon-fish-tanks](https://www.desertcart.ec/products/218013253-premium-under-gravel-filter-system-for-29-gallon-fish-tanks)

---

*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-03-08*