GRECH CBG-500 HOB Aquarium Filter with 5W UV Clarifier

The GRECH CBG-500 is a hang-on-back aquarium filter designed for 10- to 30-gallon freshwater and saltwater aquariums. It combines adjustable 132 GPH flow, mechanical and biological filtration, a surface skimmer and an integrated 5W UV clarifier, with activated carbon and bio media included for a practical external filtration setup.

Multi-Stage Filtration with an Integrated UV Clarifier

This HOB aquarium filter combines several water-care functions in one external unit. Adjustable water flow lets you tune circulation, while mechanical and biological filtration work alongside the included activated carbon and bio media. The integrated UV clarifier can be switched on or off as needed to support clear aquarium water.

Key Features

• 💧 132 GPH adjustable flow: Water flow can be adjusted to suit the aquarium's filtration and circulation needs.
• 💡 5W UV clarifier: An integrated UV unit can be turned on or off to support clear, bright aquarium water.
• 🧽 Multi-stage filtration: Combines mechanical and biological filtration with included activated carbon and bio media.
• 🌊 Surface skimmer: An adjustable skimmer helps reduce unwanted film and buildup at the water surface.
• 🐠 10- to 30-gallon tanks: Designed for aquariums within this capacity range.
• 🧂 Freshwater or saltwater: Suitable for freshwater and marine aquarium setups.
• 🔧 Hang-on-back design: Mounts externally on the rear of the aquarium for convenient filtration.

Why You'll Love It

The CBG-500 brings filtration, surface skimming and UV clarification together in a compact hang-on-back format. Its external installation keeps the main filter body outside the aquarium while providing adjustable water flow for different tank setups.

• Combined water care: Mechanical and biological filtration are paired with carbon, bio media and UV clarification.
• Surface management: The adjustable skimmer helps address films that collect at the water surface.
• Flexible aquarium use: Designed for home aquariums, tropical fish tanks and planted setups in freshwater or saltwater applications.

Filtration & Water Clarification

The filter uses mechanical and biological filtration and comes with activated carbon and bio media. Together, these components provide multiple filtration functions within the hang-on-back unit.

A built-in 5W UV clarifier provides an additional water-clarification feature and can be switched on or off independently.

Adjustable Flow & Surface Skimming

The CBG-500 provides an adjustable flow rate of up to 132 GPH. This allows water movement to be tailored to the aquarium rather than operating at a single fixed flow setting.

The adjustable surface skimmer is designed to help reduce unwanted films and buildup from the surface of the aquarium water.

Aquarium Compatibility

This HOB aquarium filter is intended for tanks from 10 to 30 gallons. It can be used with freshwater and saltwater aquariums, including tropical fish tanks and planted aquarium setups.

Setup

Before installation, rinse the filter media with clean tap water to remove loose dust or particles. Assemble the intake tube, secure the intake cover and place the included media into their designated compartments.

Hang the filter securely on the back of the aquarium with the intake tube fully submerged. Before powering on, prime the unit by adding aquarium water to the motor compartment and filter reservoir.

What's Included

The unit includes the aquarium filter, with activated carbon and bio media supplied as part of the filtration setup. The product carries a stated one-year warranty.

FAQ

What aquarium size is the CBG-500 designed for?

It is designed for aquariums from 10 to 30 gallons.

Does the filter include a UV clarifier?

Yes. The filter has an integrated 5W UV clarifier that can be switched on or off.

Can it be used in saltwater aquariums?

Yes. The CBG-Series filter is suitable for both freshwater and saltwater aquarium setups.

Convenient External Filtration for Smaller Aquariums

With adjustable 132 GPH flow, mechanical and biological filtration, included filter media, surface skimming and a switchable 5W UV clarifier, the GRECH CBG-500 provides a versatile hang-on-back filtration setup for 10- to 30-gallon aquariums.