Classic Aqua Flow Internal Sponge Filter – CAF-25 (Up to 25 Gallons)
The Classic Aqua Flow CAF-25 is a reliable and efficient internal sponge filter designed for aquariums up to 25 gallons. Ideal for shrimp tanks, fry grow-outs, or as supplemental filtration, this filter provides gentle mechanical and biological filtration without disturbing delicate tank inhabitants.

Featuring a simple air-driven design, it works in combination with an air pump (sold separately) to draw water through the sponge, trapping debris and cultivating beneficial bacteria for a cleaner, healthier aquarium. Easy to install and maintain, the CAF-25 is perfect for freshwater and breeding setups looking for quiet, low-impact filtration.