![]() The air-water mixture in the tube becomes less dense.The air bubbles rise and mix with the aquarium water inside the uplift tube.An aquarium air pump injects compressed air at the bottom of the uplift tube.Here’s how an uplift tube moves water through the sponge: A porous sponge is wrapped around the perforated section of the uplift tube. The uplift tube is a vertical hollow pipe with perforations at the bottom. No matter the brand, all sponge filters use an uplift tube to pull water through the sponge. Some designs don’t have a heavy base and use suction cups to attach the filter to the side of the aquarium. How a sponge filter worksĪ sponge filter consists of a weighted base to keep the filter secure at the bottom of the aquarium. It does not have chemical filtration properties. Mechanical filtration traps solid particles of debris like uneaten fish food, solid fish waste and dead algae cells.Ĭhemical filtration uses adsorbent media like activated carbon to remove dissolved organics that discolor the water and reduce water quality.īiological filtration relies on nitrifying bacteria and other microbes to convert harmful byproducts, like nitrite and ammonia, to nitrate.Ī sponge filter provides mechanical and biological filtration. You may remember there are three basic categories of aquarium filtration. Replacement sponges are available as well as a filter kit complete with an air pump. This sponge filter is rated for up to 55-gallon aquariums. ![]() The angled outlet, when placed at the water surface will create water movement and aeration at the tank’s surface. ![]() This means you can position the filter lower in the aquarium and raise the uplift tube to the surface. Huijukon sponge filters have an adjustable height uplift tube. This sponge filter is easy to hide behind plants, rocks and driftwood. This makes the filter less intrusive in the aquascape and reduces the “footprint” in your aquarium. ![]() The Huijukon design attaches to the side of the aquarium glass with suction cups. This will ensure one sponge is fully colonized with bacteria even if you have to replace the other. You can also alternate cleanings between the each sponge. This allows for more flow through the thinner sponges. The idea behind two sponges is greater surface area and less depth for the water to pass through. The Huijukon sponge filter has a twin sponge design. ![]()
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