This is the one filter in the hobby that gets overlooked and talked down to. However, they have their purposes. My goal today is to help you determine the best internal aquarium filter for you. Ready to dive in? This is the first question I need to address because there is some misconceptions as to what one is. There are cheap internal filters that run off an air pump.
I feel that sponge filters are far superior to any of the air pump powered internal filters you can purchase. The ones that run off an impeller. These internal filters are more powerful and versatile than the cheap air powered ones.
These internal filters are designed to fit into small spaces and in smaller tanks. They can offer 3 stage filtration and some are designed to keep a low profile so they stay hidden in a tank. I looked at the following when making this list:. I got 7 in total here, all brand names.
These are brands I trust and have used over the years. Several of these brand names have received my recommendation as the best filter for other categories. In a hurry? It's the only internal filter I trust in aquascapes. What if I told you that OASE created an internal version of the Biomaster that offers some of the same great features! This internal aquarium filter is a 3 stage filter that is powered by filter foam and activated carbon foam. You can also switch out one of the foam filters to a 30 ppi fine foam to have a polishing stage.
The filter can actually still run when you are replacing media. The outlets are designed to skim the surface of the aquarium in order to prevent surface scum build and has and adjustable dial to tune up or down the flow.
This keeps the heater out of sight and away from your fish. I love this feature because it makes for a clean presentation. It is designed to fit in a corner so it stays out of sight! It hides so well in aquascapes and looks professional. I almost prefer the look to a power filter. The main con with this filter is the price. If you are looking for an internal aquarium filter, this is the one to buy!
Penn-plax has the most utilitarian filter on this list. This filter is designed to be an internal canister filter.
It is designed to be completely a submersible filter that can be placed vertically or horizontally. This makes it a great choice if you are planning to use this in a shallow aquarium, paludariums, and turtle tanks.
It also comes with a direction flow nozzle so you can turn the flow in any direction you want. This gives this filter more versatility over the BioPlus, which is mainly designed as a fish tank filter. The filter can also use a venturi outlet or spray bar to provide oxygen to your water. The Cascade has a flow regulator at the top of the unit so you can adjust the flow of the outlet. The filter is very easy to use and well priced. Easily the best buy on here if you are looking for bang for the buck.
If you have been following me for a while, you know that I rarely put Tetra filters on a list. This internal filter, however, is the exception. It is economical and fits the bill perfectly in a small tank.
It is very quiet and easy to use. The main issue is how it mounts. It mounts with a clip instead of a suction cups or magnet. This limits the filter to the top of your tank, which can be a problem if you are using it for shallow setups.
It has a diatom polish filter option, which is something that has been used clear up water, remove dinos , and even useful in quarantine tanks. The filter, when operating normally is a 2 stage filter. It has a filter floss sleeve that you slide into the chamber and a media chamber. If you are going to use this as a 3 stage filter, my suggestion would be to add some biological filtration media in the media chamber.
It has a splitter in it so you place more than 1 type of media. It is powerful at gallons per hour and can be tuned down as needed. It also goes on sale often.
Definitely look into it when it goes on special. An internal filter that is designed to be used for both shrimp and fish fry. An excellent alternative to traditional sponge filters! Finding a filer that works for freshwater shrimp and fish fry can be a challenge! In the second stage, the carbon cartridge traps fine debris and eliminates impurities to improve water clarity and smell. Finally, Biomax provides the best environment for helpful bacteria to process nitrogenous toxins to protect your aquarium inhabitants.
A unique feature of the Fluval U4 is that it returns water to the aquarium through three ways including top output, bottom output, and an integrated spray bar for better water filtration and circulation. There is an adjustment knob on the top output for you to adjust the water output to achieve gentle flow and quiet operation. Aqueon gives you this fully submerged filter that can be positioned horizontally or vertically. You can adjust the return flow rate, as well as the height and direction of water return.
What makes it loved by many hobbyists is the very large filter chamber for the free of using filter media. You can use your favorite filter materials or ones coming with the product package.
The filter uses a large internal filter cartridge from Aqueon to give you a three-stage filtration including mechanical, chemical and biological. Dense foam for trapping larger particles, activated carbon to eliminate chemical toxins, odors and discolorations, and patented BioGrid to take care of ammonia and nitrites. This is an ideal choice for aquariums or reptile tanks up to 30 gallons.
If you want an in-tank filter that offers advanced physical, chemical, and biological filtration while increasing the aeration of your fish tank, Penn Plax Cascade is a submersible filter for you. Able to deliver up to gallons per hour of flow rate, the filter is an ideal choice for gallon fish tanks or terrariums. The Penn Plax Cascade internal filter is able to clean your aquarium at different levels.
It is equipped with an activated carbon cartridge to get rid of harmful chemicals and toxins, odors, discoloration, and other contaminants in the water. It also comes with an internal sponge that improves the colonization of beneficial aerobic bacteria, which provides a healthy balance in the aquarium environment. Thanks to its large capacity, you can choose your favorite filter media to use. The filter features a pump head that lets you adjust the water flow and direction.
There comes a spray bar in the package that helps to divide the output water into many small streams, which enhances your aquarium aeration and biological filtration. This in-tank filter is a good choice for the filtration system of fish or turtle tanks up to 50 gallons. It has a GPH output and is ideal for both freshwater and saltwater environments. It also has an air line hose for oxygen input, which increases the aeration of your tank and makes your fish and turtles active and healthy.
This filter features a dual intake system, one comes from the bottom of the filter, and the other one from the top plays the role as a surface skimmer, which keeps the water surface free of dirty particles. The system is composed of a 1-pump, 2-impeller return system that provides optimal water flow.
You can also configure the filter to include a spray bar. It comes with a sponge pre-filter media and a carbon basket filled with premium carbon, which keep your aquarium water clean and clear. With that out of the way. We decided to take a closer look at some of the best internal aquarium filters available to find the best models out there.
Unlike external filters that need to be kept in cabinets or hang on the back of your fish tank. Internal filters are placed inside your aquarium, allowing you to place your aquarium up against a wall.
Internal filters are great for smaller fish tanks but can also help with dead spots in larger tanks. Or, they can be used to help with additional filtering due to a higher bio-load. These filters are effortless to set up, small, and very quiet; they provide excellent filtration while being easy on your wallet.
We are confident the Aqueon QuietFlow Internal Filter — Small would be an excellent choice for any 10 — gallon setups. Click the links below for more articles about internal fish tank filters. Looking for something with a little more filtration.
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