Have you ever gazed into your fish tank and thought, “Wow, this water looks cloudy!”? A dirty tank isn’t just ugly; it’s unhealthy for your fish. Keeping your underwater friends happy and healthy is super important, and a good filter is key. But with so many filter types out there, where do you even start? Choosing the right one can feel like navigating a maze!
Picking a filter can be tricky. There are so many choices, like canister filters and hang-on-back filters. But today, we’re talking about a classic: the under gravel filter (UGF). It’s easy to overlook, but it can be a great choice. Maybe you are not sure if this filter is right for you. Maybe you are confused by the different options. This post will help you! We’ll explore what makes UGFs tick, their pros and cons, and how to choose the best one for your fishy friends.
By reading this guide, you’ll learn all about under gravel filters. You’ll understand how they work, the good and bad points, and if one is right for your fish tank. Get ready to become a filter expert and create a clean and happy home for your fish! So, let’s dive in and explore the world of under gravel filters!
Our Top 5 Under Gravel Fish Tank Filter Recommendations at a Glance
Top 5 Under Gravel Fish Tank Filter Detailed Reviews
1. Penn-Plax Undergravel Aquarium Filter for 40-55 Gallon Tanks – Four 11.25” x 11.25” Plates – Under Gravel System for Clear
Rating: 8.5/10
The Penn-Plax Clear-Free Premium Under Gravel Filter is an old-school way to keep your aquarium clean. It’s designed for 40-55 gallon tanks. This filter uses an air pump (not included) to cycle water. It has four filter plates that sit under your gravel. The system cleans water and keeps your tank looking good. This simple design makes maintenance easy.
What We Like:
- It provides biological, chemical, and physical filtration.
- The filter also aerates your tank. It’s a filter and a bubbler in one!
- It has replaceable carbon cartridges for extra cleaning.
- The system is easy to maintain.
- It’s safe for both freshwater and saltwater tanks.
What Could Be Improved:
- You need to buy an air pump separately.
This undergravel filter is a good way to keep your aquarium water clear. It’s a simple and effective choice for fish owners.
2. Penn-Plax Undergravel Aquarium Filter for 15-20 (high) Gallon Tanks – Two 11.2” x 11.25” Plates – Under Gravel System for Clear
Rating: 9.4/10
The Penn-Plax Undergravel Aquarium Filter is an old-school way to keep your aquarium clean. This filter uses an air pump (not included) to cycle water. It uses filter plates and gravel to clean the water. It is designed for 15-20 gallon tanks. This filter provides biological, chemical, and physical filtration. It also adds air to your tank. This filter is safe for both freshwater and saltwater tanks.
What We Like:
- It offers three types of filtration: biological, chemical, and physical.
- The filter also aerates the tank.
- The design is simple, making maintenance easy.
- It comes with everything you need, except for the air pump.
What Could Be Improved:
- The air pump is not included, so you need to buy it separately.
- The color of the filter plates may vary.
The Penn-Plax Undergravel Aquarium Filter is a simple and effective way to clean your aquarium. It’s a good choice for anyone who wants a basic, easy-to-maintain filter system.
3. Penn-Plax Undergravel Aquarium Filter for 20 (Long) – 29 Gallon Tanks – Two 14” x 11.1” Plates – Under Gravel System for Clear
Rating: 8.8/10
The Penn-Plax Undergravel Aquarium Filter is a classic way to keep your fish tank clean. This filter is designed for 20 (long) to 29-gallon tanks. It uses an air pump (sold separately) to pull water through the gravel and filter plates. This process provides biological, chemical, and physical filtration. The filter also aerates the water, helping your fish breathe easier. The package includes everything you need to get started, except the air pump.
What We Like:
- Simple design for easy maintenance.
- Provides three types of filtration: biological, chemical, and physical.
- Also aerates the water, giving your fish extra oxygen.
- Comes with activated carbon cartridges for cleaner water.
- Works for both freshwater and saltwater tanks.
What Could Be Improved:
- Requires an air pump, which is not included.
- May need more cleaning than other filter types.
The Penn-Plax Undergravel Filter is a good, basic filter for smaller tanks. It is a budget-friendly option to keep your aquarium clean and healthy.
4. Penn-Plax Replacement Media (2 Pack) – Fits Multi-Pore and Undergravel “E” Filters – Provides Chemical Filtration (FC2)
Rating: 9.1/10
The Penn-Plax Replacement Media (2 Pack) is a great option for your aquarium. These cartridges fit Multi-Pore and Undergravel “E” filters. They help keep your water clean by removing bad stuff. This 2-pack is a simple way to replace your old filter media. Remember to change them regularly to keep your fish happy and healthy.
What We Like:
- Easy to install and use in your filter.
- Removes harmful chemicals and bad odors from your tank.
- Works for both freshwater and saltwater aquariums.
- Helps keep your water clear.
- Comes in a convenient 2-pack.
- Made by Penn-Plax, a trusted pet supply company.
What Could Be Improved:
- You need to replace them every few weeks.
- Only works with specific filter types.
If you have an undergravel filter, these Penn-Plax cartridges are a good choice. They are a simple way to keep your fish tank clean and healthy.
5. CORISRX BEST OF YOUR LIFESTYLE Undergravel Filter 11.8″ X 5.9″ Fish Tank Under Gravel Filter
Rating: 9.0/10
The CORISRX BEST OF YOUR LIFESTYLE Undergravel Filter is a simple way to keep your fish tank clean. This filter sits under your gravel. It helps keep the water moving and clear. It’s designed for small tanks and helps keep your fish healthy. The filter works with different pumps to clean the water. It is a good option for new fish owners.
What We Like:
- It helps reduce the dirt in the gravel.
- The gravel bed gives a home for good bacteria. This makes the water very clear.
- You can connect it to different pumps. This makes the filter more useful.
- The lift tube can be adjusted.
- It is quiet.
- The air stones won’t get stuck.
- It works for both fresh and saltwater tanks.
What Could Be Improved:
- The filter is only for small tanks.
- It needs to be cleaned often.
Overall, the CORISRX Undergravel Filter is a good choice for small fish tanks. It helps keep the water clean and healthy for your fish.
Under Gravel Filter Buying Guide: Keeping Your Fish Happy!
An under gravel filter (UGF) is a simple and effective way to keep your fish tank clean. It sits under the gravel at the bottom of your tank. Water gets pulled through the gravel. The gravel acts as a filter. This guide will help you choose the right UGF for your fish.
Key Features to Look For
When buying a UGF, there are a few things to keep in mind.
- Size: Make sure the filter fits your tank. Measure your tank’s length and width. UGFs come in different sizes. Choose one that covers most of your tank bottom.
- Number of Lift Tubes: Lift tubes are the parts that pull water up from under the gravel. More tubes mean better water circulation. Look for a filter with at least two tubes for a larger tank.
- Gravel Compatibility: Not all gravel works well with UGFs. You need gravel that allows water to flow through it easily. The instructions will tell you what kind of gravel is best.
- Air Pump Included: Some UGFs come with an air pump. The air pump powers the filter. If it doesn’t come with one, you’ll need to buy one separately.
Important Materials
UGFs are made of a few key materials.
- Filter Plate: This is the main part of the filter. It sits under the gravel. It’s usually made of durable plastic. Make sure the plastic is strong.
- Lift Tubes: These tubes carry the water upwards. They are also made of plastic. They must be sturdy and able to handle the water flow.
- Air Stone (If Included): An air stone helps create bubbles. These bubbles help move the water and oxygenate it. Air stones are usually made of porous materials.
Factors That Improve or Reduce Quality
Some things make a UGF better. Others make it worse.
- Good Quality Plastic: A strong filter plate and lift tubes will last longer.
- Even Hole Distribution: The filter plate needs holes all over it. This helps the water move evenly through the gravel.
- Air Pump Power: A strong air pump will move the water better. This helps keep the tank clean.
- Ease of Cleaning: You need to clean the UGF sometimes. A filter that’s easy to clean is a good one.
- Brand Reputation: Buy from a trusted brand. This means the filter is likely to be made well.
User Experience and Use Cases
UGFs are great for many fish tanks.
How it Works: The air pump pushes air through the lift tubes. This pulls water up from under the gravel. The gravel traps waste and debris. Beneficial bacteria grow in the gravel. They help break down harmful substances.
Use Cases: UGFs work well in tanks with small to medium-sized fish. They are good for beginners. They are simple to set up and maintain. They are also a budget-friendly option.
Things to Remember: You have to vacuum the gravel regularly. This removes the waste that the filter traps. You also need to replace the air pump sometimes. The air pump may wear out.
Frequently Asked Questions (FAQ)
Q: What is an under gravel filter?
A: An under gravel filter is a filter that sits under the gravel in your fish tank. It cleans the water.
Q: How does an under gravel filter work?
A: An air pump pulls water through the gravel. The gravel traps waste. Bacteria in the gravel help clean the water.
Q: Is an under gravel filter good for all fish tanks?
A: No, they are best for tanks with small to medium-sized fish. They aren’t ideal for heavily stocked tanks.
Q: What kind of gravel should I use?
A: You need gravel that allows water to flow through it. Gravel particles should be of a specific size.
Q: How do I clean an under gravel filter?
A: You need to vacuum the gravel regularly. This removes waste. You might also need to remove the filter and rinse it sometimes.
Q: How often should I clean the gravel?
A: Clean the gravel every week or two. It depends on your tank size and the number of fish.
Q: What if my air pump stops working?
A: The filter will not work if the air pump stops. Replace the air pump as soon as possible.
Q: Can I use an under gravel filter with live plants?
A: Yes, but it can be tricky. The filter may disturb the roots of the plants. Choose plants that can adapt.
Q: Are under gravel filters hard to set up?
A: No, they are usually easy to set up. Follow the instructions that come with the filter.
Q: Do I need any other filters with an under gravel filter?
A: You might want to use an additional filter. A power filter can help remove larger debris. This depends on your tank and the fish you have.
In conclusion, every product has unique features and benefits. We hope this review helps you decide if it meets your needs. An informed choice ensures the best experience.
If you have any questions or feedback, please share them in the comments. Your input helps everyone. Thank you for reading.