The BioPlus Coarse L is a specialized filter sponge designed to provide both mechanical and biological filtration for aquariums equipped with Juwel internal filter systems. This essential component captures debris from the water column while simultaneously hosting beneficial bacteria that break down harmful waste products, ensuring a clean and healthy environment for your marine inhabitants.

Engineered with an open, coarse-pored structure, this sponge offers a large surface area that supports robust biological filtration within the aerobic zone of your filter. The unique pore design guarantees a relatively high and even water flow velocity, which maximizes oxygen exchange and prevents clogging. Furthermore, these sponges are manufactured without the use of chemicals, ensuring there are no toxic residues left behind to harm sensitive coral or fish.

This filter media is best suited for reef aquarium enthusiasts using Juwel filtration units who require reliable mechanical pre-filtration combined with efficient biological support. It is an ideal choice for maintaining optimal water flow and bacterial colonization in systems where high oxygen levels are critical, making it a dependable upgrade for standard maintenance routines.