![]() ![]() Water passes through the sponge before it reaches your filtration system. When used this way, sponge filters are sometimes referred to as pre-filter sponges because they are exactly that – a sponge that sits on your filter tube intake. While sponges continue to make a great cheap primary filter, they are also often used to add an extra layer of protection to your tank. While they used to be the preferred way to filter an aquarium, advancements in filter technology have seen the sponge filter become less popular. When my grandfather was growing up, his tank had a sponge filter – and it wasn’t exactly a new discovery then, or so he claims! If you have never heard of a sponge filter before, it may surprise you to learn that they have been around a long time. ![]() Since sponge filters don’t have a way to force water through them, they are used in conjunction with an air pump, airstone or powerhead. While this filtration method may seem basic, it’s quite effective! This forces water to be drawn through the foam sponge.Īs water passes through the sponge, it catches and traps debris, such as fish poop, uneaten food and decaying plants, filtering it from the water.įiltered water then passes through the lift tube and back into your tank. ![]() With a good air pump attached, bubbles rise up the lift tube and out into your tank. While it may not look like much, these four parts actually form a very effective filter.Īs for how a sponge filter works, well, it’s very clever… Lift tube – Water flows up this and back into your tank. Strainer and bulls eye – Slides inside the sponge and allows you to connect airline tubing directly to the filter.Ĥ. Weighted base – Stops the sponge filter from floating around your tank. Foam sponge – It wouldn’t be a sponge filter without it.Ģ. While sponge filter designs vary from brand to brand, they are typically made up of four different parts:ġ. What is a sponge filter, and how does it work?Ī sponge filter is little more than a piece of foam that sits inside your aquarium and filters your water. Return the sponge filter to your aquarium Best DIY Sponge Filter Foam – Swiss Tropicals Poret Foam.What are the disadvantages of sponge filters?.It’s a 2-in-1filter: mechanical and biological ![]()
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