Aquarium Filter Purchase Guide: Essential Information for Aquarium Enthusiasts
Choosing the perfect internal aquarium filter for your critters, whether it's salt, brackish, or freshwater, is a crucial step in setting up a new aquarium or enhancing an existing one. Here's a rundown of some popular picks and what you need to know to make the best decision for your tank.
We've dug deep into various internal aquarium filters, focusing on the ones you can place inside your tank – leaving out the external filters that venture under, above, or connect to the tank rim. This guide highlights crucial factors that enhance the life of your aquatic friends and ensure a thriving aquarium.
What's the Importance of an Internal Aquarium Filter?
Internal filters are great for small to medium-sized aquariums. Besides the water pump, they are essential components of most aquariums. They are simple to mount and easily slide within the aquarium, requiring no cumbersome pipes or lines. You can even use them as a powerhead for water movement, with the added benefit of additional filtration.
Internal filters are the most basic and widely available type of aquarium filter, ideal if you're short on space around the aquarium. The output of an internal filter sits just below the water’s surface and rests on the tank border. The filter sucks the water inside and then pushes it through filter material before returning it to the tank.
It's crucial to remember that you should clean the impeller of your filter every few weeks to ensure proper functioning and maintain water movement.
Internal Aquarium Filter Basics
A good filter should clean the water and convert harmful ammonia into less harmful chemicals. Mechanical filtration is the process of trapping debris, whereas biological filtration transforms waste using microorganisms. You can utilize chemical filtration to absorb or alter anything in the water.
Ideally, the finest filters integrate mechanical, biological, and chemical filtration. However, basic foam filters may filter mechanically and biologically using only a sponge. Smaller tanks require smaller filters, while larger tanks need larger ones to manage larger fish loads. The larger the filter output and media capacity, the larger the tank you can support more fish.
Why Internal Aquarium Filters Shine
Placing internal filters inside the tank and driving them with an air pump or powerhead/pump makes them quick and easy to use. They are also compact, making them suitable for smaller tanks. In addition, they are affordable to run. Air-powered sponge filters are essential for aquariums housing fish fry because they provide gentle filtration without sucking up newborn fish. Internal power filters, which generate a jet of water and draw in more debris, are the most popular type of filter.
Pick a modest internal power filter for a small tank and a larger model for a large aquarium, or go big and have one at each end of the tank. Cleaning schedules can vary to maintain high beneficial bacteria levels and allow them to function correctly.
Frequently Asked Questions
What's the Advantage of Investing in an Internal Aquarium Filter?
Internal filters take up less space and are cheaper than external filters. Besides filter refills, they are quite simple to set up and usually require no additional components.
What Types of Internal Aquarium Filters Exist?
The critical difference among internal aquarium filters is the filter material and filtration methods. Different filter materials handle various waste categories best. Some filters are designed for freshwater or marine aquariums, while others can handle both – usually indicated in the product specifications.
What Should You Consider?
Ensure the filter is compatible with your tank's water type – a freshwater-only filter can be hazardous in a marine aquarium. Check the filter's capacity, as it can only handle a limited amount of water. Most filters have recommended tank size limits to help you figure this out.
In selecting filters for this compilation, we looked for distinct features, reliable brand names, and ease of use. Simplicity stands out when it comes to internal filters!
OASE BioPlus Internal Aquarium Filter
This three-stage internal aquarium filter combines foam and active carbon foam filtration. You can enhance its filtration with a 30 PPI fine foam by replacing one of the foam filters. The filter can continue working even after media changes.
The outlets are designed to sweep the aquarium's surface, reducing surface scum buildup. They come with an adjustable dial to control the flow rate. An OASE Heat Up aquarium heater can also be installed at the filter's rear, keeping it hidden and away from your fish.
Features
- Incorporates a built-in heater
- Offers biological, mechanical, and chemical filtration in three stages
- A quiet and efficient internal corner filter that gently circulates and filters aquarium water
- Contains a diffuser and adjustable water flow nozzle for consistent surface circulation and increased oxygen distribution
Pros
- Built-in heater
- The mechanical filter chamber is detachable
- Long-lasting, being of German origin
Cons
- More expensive than other filters
- Difficult to find in local fish stores
Penn-Plax Cascade Internal Filter
Penn-Plax offers one of the most effective filters. This filter is built to be an internal canister filter, capable of holding a lot of material for an internal filter, and it is entirely contained. This makes it suitable for shallow aquariums, paludariums, and turtle tanks.
It is a submersible filter and can be installed either vertically or horizontally, making it versatile. It features a direction flow nozzle, allowing you to control the direction of the flow. This filter includes a venturi outlet or spray bar for oxygenating the water. It's simple to use and reasonably priced.
Features
- Efficient and quiet
- Compatible with adjustable flow and venturi oxygenation
- Entirely submersible for use in shallow aquariums, paludariums, and turtle tanks
- Easy to operate and affordably priced
Pros
- 3-stage filtration
- Large capacity
- Outstanding value for money
Cons
- May not be the most pleasing to the eye
- Has a large footprint
Tetra Whisper Internal Filter
The whisper filter contains a conventional bio-bag but also features a permanent biological filter (known as a bio-scrubber by Tetra) to compensate for the detachable filter cartridge. It is quiet and simple to operate.
The Whisper In-Tank Filter delivers the same efficiency and productivity as an external filter while operating in as little as 2 inches of water, making it perfect for turtle tanks or generating a waterfall inside the tank. With suction cups and/or a frame, it adaptably attaches to high or low water levels. Each filter comes with one pre-assembled Whisper Bio-Bag filter cartridge.
Features
- Universal design for easy mounting to the interior of your aquarium
- Ideal for turtle tanks or creating waterfalls
- Adapts to high or low water levels with suction cups or a frame
Pros
- 3-stage filtration (bio-bag, bio-scrubber, and mechanical filtration)
- Works with various aquarium setups
- Inexpensive
Cons
- Cartridge-based
- Can only be attached with a clip
Marineland Magnum Polishing Filter
When operating normally, the filter functions as a two-stage filter. It features a media chamber and a filter fiber sleeve that can be slotted into the chamber. If you want a three-stage filter, simply fill the media chamber with a biological filtration medium. Its splitter allows multiple filter media types to be used.
Features
- Internal canister filter featuring powerful filtration and adjustable flow rate
- Versatile filtration options: micron water polishing, bio-media basket, and biomax
- Includes components: Marineland Magnum Polishing Internal Canister Filter (ML90770)
Pros
- Powerful
- Works up to 90-gallon aquariums
- Diatom option available
Cons
- Only a two-stage filter
- Large size
Aqueon Quietflow Internal Filter
The whisper filter includes the conventional "bio-bag," but it also features a permanent biological filter (known as a bio-scrubber by Tetra) that replaces the detachable filter cartridge. It is quiet and simple to operate.
The Whisper In-Tank Filter delivers the same reliability and productivity as an external filter while operating in as little as 2 inches of water, making it perfect for turtle tanks or generating a waterfall inside the tank. With suction cups and/or a frame, it adaptably attaches to high or low water levels. Each filter comes with one pre-assembled Whisper Bio-Bag filter cartridge.
Features
- Self-priming for a rapid start
- Includes a smaller replaceable filter cartridge, a media sponge, a bio-grid, and a pre-assembled bio-bag filter cartridge
- Fits tanks up to 10 gallons
Pros
- Works well with shrimp and fish fry
- Easy to operate
- Available in 10 or 20-gallon sizes
Cons
- Cartridge-based
- Can be noisy
Fluval U3
The Fluval U3 is undoubtedly the most powerful internal filter on our list. Similar to the Fluval C3 series filters, it features a complete three-stage mechanism. The model utilizes two foam pads, one for mechanical filtration and one for polishing. It also includes two chemical filtration cartridges and two ceramic rings for biological filtration media.
Just like the Penn-Plex, it is a submersible filter that can be installed horizontally or vertically. When it comes time to clean the filter, the flip-top cover simplifies the process. It features 3-way flow control and a spray bar that can be connected to the filter for oxygenation purposes.
Features
- Sleek design with an easy-to-grasp water flow panel and a new media cartridge that captures more waste
- Easily accessible flip-top lid for simple maintenance
- Suitable for freshwater, saltwater, and reptile aquariums up to 40 gallons
Pros
- Produced in Italy
- Fully submersible
- 3-stage filtration
Cons
- Cartridge-based
Sicce Shark
The Shark includes a magnetic rapid uncoupling system (MCS System) from Sicce. This means that the filter chambers are held in place by magnets that can be easily removed for servicing. The filter draws water from the bottom and features an adjustable input diameter to prevent small fish from entering.
The filter also comes with a flow regulator and a venturi function for adding oxygen to the water. It is designed to offer flexibility, allowing the use of various types of filter media. Sicce offers a variety of materials that can be purchased or customized with personal media.
Features
- Water flow control and flow dutying device
- Adjustable water flow regulation
- Tool-free maintenance with the MCS System
Pros
- Sicce brand reputation
- Fully submersible
- 3-stage filtration
Cons
- Large footprint
- May not be visually pleasing in the tank setup
What Are Internal Aquarium Filters Used For? (Best Uses)
Internal filters can come in handy in specific scenarios. Although canister and power filters are superior, they aren’t ideal for all applications. Here are some situations in which an internal filter makes sense:
Nano Tanks
In the world of aquariums, a 20-gallon tank or less is perfectly suitable for an internal aquarium filter. Internal filters, such as the OASE, can maintain a low profile in the tank and reduce congestion. They have the capacity to handle tanks of this size and may be quieter than power filters.
Shrimp Tanks
Internal filters, such as the Aqueon Quietflow, work well for freshwater shrimp tanks. They offer three stages of filtration while remaining gentle enough not to harm the small shrimp.
Betta Fish Tanks
Internal filters can prove particularly useful for long-finned varieties of betta fish. The OASE, for example, can be placed in a corner with a heater, allowing the betta to roam freely in the aquarium without fear of its fins becoming entangled in the intake or darting near the heater.
Breeder Tanks
Breeder tanks, similar to shrimp tanks, require a low flow and gentle filtration. With suitable setup, an internal aquarium filter can meet these requirements.
Turtle Tanks
Turtle tanks benefit greatly from submersible filtration, as the filters can be placed anywhere underwater. This placements makes them quieter than canisters and power filters, as they pump water at or below the waterline rather than above.
Axolotl Tanks
Finally, for Axolotl aquariums, submerged filters are ideal. Given the amount of waste these salamanders produce, acquiring a larger filter makes sense. Utilizing an internal filter over others will contribute to a quieter system, as they can be placed anywhere the Axolotl feels most relaxed.
Conclusion
When designed with care, internal filters can offer filtration for any type of tank. This review aims to alleviate your concerns in choosing the right filter for your needs.
After setting up an internal aquarium filter, you may want to explore other aspects of your critters' lifestyle. For instance, might find enjoyment in exploring the realms of fashion-and-beauty, adorning your aquarium with decorative elements or selecting stylish attire for yourself.
As your fish or other underwater creatures thrive in their vibrant habitat, you might take delight in preparing mouthwatering dishes from the food-and-drink category, impressing both yourself and your aquarium inhabitants with delectable culinary creations.
To broaden your horizons, consider spending time learning about trends and achievements within the sphere of education-and-self-development. Engaging in continued learning is an excellent way to stay informed and well-rounded.
In your spare time, immerse yourself in the world of entertainment, boasting various engaging activities such as movies, music, or games. These can serve as enjoyable ways to unwind after a day filled with captivating life beneath the water's surface.
Maintaining a strong connection with the outside world, immerse yourself in the general-news, keeping yourself updated on current events, political happenings, and other important trends shaping our planet. Staying informed and knowledgeable can help you make informed decisions as an aquarium owner, fish enthusiast, or any member of society.
