Juwel bioPlus Fine Filter Sponge L

Juwel bioPlus Fine Filter Sponge L – Fine-Pore Filter Media for Biological Filtration

The Juwel bioPlus Fine Filter Sponge L is a fine-pore filter medium designed for aquarium biological filtration. It provides a large surface area for beneficial bacteria to colonise, supporting the nitrogen cycle in freshwater and marine setups.

• Fine pore structure maximises bacterial colonisation surface for efficient biological filtration
• Blue colour allows visual inspection of filter flow and saturation level at a glance
• Compatible with Juwel Bioflow L filter systems for seamless integration
• Standard filter sponge format fits the Juwel filter media holder without modification

What makes the Juwel bioPlus Fine Filter Sponge L different

Unlike coarse filter foams that trap debris mechanically, this fine-pore sponge is optimised for biological filtration. The dense micro-structure supports a high density of nitrifying bacteria, converting ammonia and nitrite into less harmful nitrate. The blue colour coding distinguishes it from coarser media grades in the Juwel bioPlus range.

Ideal for...

Aquarium hobbyists maintaining freshwater or marine tanks up to 40 litres who use a Juwel Bioflow L filter. Suitable for hobbyists who prioritise biological filtration stability and prefer a ready-to-use, replacement filter medium without the need for cut-to-fit modification.

Application of Juwel bioPlus Fine Filter Sponge L

1. Rinse the sponge briefly in aquarium water (never tap water) to remove loose particles
2. Place it in the filter compartment designated for fine filter media in the Juwel Bioflow L
3. Replace every 4–6 weeks or when flow rate noticeably decreases
4. For best results, use in combination with coarser bioPlus media layers for mechanical pre-filtration