The Top Fin SF20 Aquarium Bio Replacement Sponge Filter is designed for 20-gallon freshwater tanks. Made by Top Fin, this foam/sponge filter is an internal filter that helps to keep the water clean and healthy for your fish. It is a reliable and efficient way to filter the water in your aquarium, ensuring a safe and comfortable environment for your aquatic pets. Made in China, this filter is compatible with the Top Fin SF20 model and comes in its original packaging.
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