HOB Aquarium Filter Baffle Water Surface Calmer Flow Reducer

Aquarium HOB Filter Baffle – Water Surface Calmer & Flow Reducer

Transform your aquarium into a tranquil, healthy environment with this smart HOB Filter Baffle. Designed to disperse and soften the strong output of hang-on-back filters, this water surface calmer reduces turbulence, splashing, and noise — creating a gentle, natural current that your fish and plants will love.

Why Your Tank Needs This Baffle

High-flow HOB filters can create powerful currents that stress delicate fish, long-finned species like bettas, shrimp, and floating aquatic plants. This baffle attaches directly in front of your filter's output nozzle to tame and redirect flow, keeping your aquatic environment calm and balanced.

Key Features

• Flow Control: Disperses strong HOB filter output, significantly reducing water turbulence, surface splashing, and filter noise for a peaceful tank.
• Built-In Sponge: The integrated sponge layer pre-filters debris as water passes through, contributing to clearer, cleaner water.
• Triple Suction Cup Mount: Features three suction cups in a stable triangular layout for firm, long-lasting adhesion to aquarium glass — no tools required.
• Adjustable Positioning: Easily reposition along the tank wall to customize water flow direction and intensity to suit your specific setup.
• Wide Compatibility: Fits most HOB filters with outlets up to 4.6 inches (approx. 11.7 cm) wide — suitable for mid to large aquariums. For smaller outlets under 3.8 inches, a compact size is recommended.
• Durable PETG Construction: 3D-printed from premium PETG material for long-lasting durability and water resistance. Both the baffle body and sponge are removable for quick, easy rinsing.
• Easy Maintenance: Simply rinse the baffle and sponge with warm water before first use and during routine maintenance for optimal performance.

Specifications

• Item Type: Aquarium Filter Baffle
• Material: PETG & Sponge
• Color: Black
• Dimensions: 12.5 × 6 × 3.5 cm (4.92 × 2.36 × 1.38 in)
• Country of Origin: Made in China

Package Contents

• 1 × Aquarium HOB Filter Baffle (with integrated sponge & triple suction cups)

Perfect For

• Betta fish, shrimp, nano fish, and long-finned species sensitive to strong currents
• Planted tanks with floating or delicate aquatic plants
• Mid to large aquariums using hang-on-back (HOB) filters
• Aquarists who want a quieter, calmer tank environment

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Learn more: U.S. Fish and Wildlife Service

Frequently Asked Questions

Q: What size HOB filter outlets does this aquarium filter baffle fit?

A: This HOB filter baffle is designed to fit most hang-on-back filter outlets up to 4.6 inches (approximately 11.7 cm) wide, making it suitable for mid to large aquariums. If your filter outlet is smaller than 3.8 inches, we recommend the compact size version for a better fit.

Q: How do I install the aquarium flow reducer — do I need any tools?

A: No tools are required! Simply press the three suction cups firmly against the inside glass of your aquarium, positioning the baffle directly in front of your HOB filter's output nozzle. The triangular suction cup layout provides a secure, stable hold. Rinse the baffle and sponge with warm water before first use.

Q: How do I clean and maintain the HOB filter baffle?

A: Both the PETG baffle body and the built-in sponge are fully removable. For routine maintenance, simply detach them and rinse with warm water. Avoid harsh chemicals or hot water, which can degrade the sponge. Regular rinsing keeps the sponge clear and water flow optimal.

Q: Is this water surface calmer safe for shrimp and bettas?

A: Yes! This baffle is specifically designed to create gentle, low-turbulence water movement that is ideal for delicate species including bettas, shrimp, small nano fish, and long-finned fish that can be stressed by strong filter currents. The PETG material is aquarium-safe and free from harmful chemicals.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.