The Top Aqua Slim Hang-On Back filter is a compact and efficient external filtration system designed to maintain clean, healthy water while keeping the inside of your aquarium free from bulky equipment. Its slim profile makes it ideal for planted tanks, aquascapes, nano setups, and community aquariums where space and aesthetics are important.
This filter uses a three-stage filtration process to ensure crystal-clear water. Mechanical filtration traps solid waste and debris, chemical filtration removes impurities and odors, and biological filtration provides surface area for beneficial bacteria to grow—essential for stable water chemistry and a healthy nitrogen cycle. Together, these stages help create a balanced and clean environment suitable for fish, shrimp, and plants.
A key advantage of this filter is its adjustable flow control, allowing you to fine-tune water movement to match the needs of your tank’s inhabitants. Gentle flow is ideal for shrimp, bettas, or delicate plants, while stronger circulation benefits more active fish and helps improve oxygen exchange.
The hang-on design keeps the filter outside the tank, preserving valuable internal space and giving your aquarium a cleaner, more open look. Its transparent housing lets you easily monitor the condition of the filter media so you know exactly when maintenance is needed. Inside, a quiet submersible motor ensures smooth operation with minimal noise—perfect for living rooms, offices, or bedrooms.
Top Aqua Slim filters are available in multiple flow-rate options, making them suitable for everything from small nano tanks to mid-sized aquariums. Whether you’re a beginner or an experienced aquarist, this filter offers a reliable, user-friendly, and space-saving solution for maintaining excellent water quality.
Slim 230: ~230 L/h flow — for mid-size tanks (~25–36 cm)
