Juwel Aquarium BioCarb aquarium water conditioner cartridge, 125×125×25 mm, for fresh and seawater

Juwel Aquarium BioCarb is a replacement water treatment cartridge for aquarium filtration systems, suitable for both freshwater and seawater. The cartridge measures 125 × 125 × 25 mm and is designed to be used within canister or internal filter setups to support biological and chemical filtration stages. It uses active charcoal in sponge form to provide a large, evenly accessible surface area for adsorption of impurities and to ensure consistent flow conditions through the filter medium.

Advantages

The BioCarb cartridge removes odour compounds, turbidity and various toxic substances from aquarium water, contributing to visibly clearer water without affecting biological filtration when used as part of a balanced filter setup. The sponge form of activated carbon provides even flow and an extensive active surface for efficient adsorption. The cartridge is compatible with common Juwel models such as Rio 350 LED and Vision 260 LED and can be used to remove residual medication after fish treatments.

Suitable for

• Freshwater aquariums
• Seawater/marine aquariums
• Canister filters and internal filter compartments that accept 125 × 125 × 25 mm cartridges
• Removing medication residues and organic contaminants

Key specifications

• Dimensions: 125 × 125 × 25 mm
• Filter medium: activated charcoal in sponge form
• Function: chemical adsorption of odours, turbidity and toxic compounds
• Compatible with biological filtration when integrated correctly

How to use

Install the BioCarb cartridge in the designated cartridge or media compartment of your aquarium filter according to the filter manufacturer's instructions. Ensure correct placement and secure fit so water flows evenly through the activated charcoal sponge. Replace the cartridge at regular intervals based on load, fish stocking and water quality; the adsorption capacity decreases over time and with exposure to dissolved organics and medication residues.

Usage recommendations

Use the BioCarb cartridge as part of a multi-stage filtration system: combine it with mechanical pre-filtration and biological media for optimal water quality. Do not use activated carbon during prolonged medication treatments unless intentionally removing medication residues after treatment. Monitor water parameters and replace the cartridge when water clarity or chemical control declines.