JUWEL BioPlus Coarse-Pored Filter Sponge (M/L/XL)

Description

BioPlus Coarse Filter Sponge

The JUWEL filter sponge coarse serves for the mechanical and biological filtering of your aquarium, making it an essential component of the JUWEL filter system.
The coarse pore structure gives a large surface area, guaranteeing relatively high and even water flow velocity. This means that it is particularly suited to biological filtering in the aerobic area.
The open pores of the JUWEL filter sponge were made without the use of chemicals, meaning that there is no residue.

Characteristics of the JUWEL coarse filter sponge:

Best mechanical and biological filtering characteristics
Homogenous structure, guaranteeing even flow conditions
No chemical residue
Suitable for use in freshwater and saltwater aquariums

Measurements

M – 9.5 x 9.5 x 4.5 cm
L – 12.5 x 12.5 x 5 cm
XL – 15 x 15 x 5 cm

BioPlus Coarse / Tank & BioFlow Filter Compatibility
Please use the below details to choose the correct BioPlus Coarse Cartridge sizes for your filter/tank.
BioPlus Coarse M (Compact)
matches the following BioFlow Filters and tanks.
JUWEL Bioflow Filter M – Filter System
and
JUWEL Lido 120
JUWEL Lido 200
JUWEL Rio 125
JUWEL Rio 180
JUWEL Rio 240

BioPlus Coarse L (Standard)
matches the following BioFlow Filter and tanks.
JUWEL Bioflow Filter L – Filter System
and
JUWEL Rio 300

BioPlus Coarse XL (Jumbo)
matches the following BioFlow Filter and tanks.
JUWEL Bioflow Filter XL – Filter System
and
JUWEL Rio 450

JUWEL BioPlus Coarse Filter Sponge in SG

BioPlus Coarse is the open-pored sponge in a JUWEL Bioflow filter, and it pulls double duty: it traps medium debris mechanically while its large surface area hosts the aerobic bacteria that handle the first stages of waste breakdown. The wide pores let water move through quickly without clogging, which is exactly what you want in the upper, faster-flowing part of the chamber.

For Singapore tanks running warm at 27-29C, that biological surface is precious because bacterial activity stays high and bioload-heavy community tanks lean on it constantly. We always tell JUWEL owners not to replace all their sponges at once; stagger them so you never strip out your whole bacterial colony in one go. Rinse in old tank water, never under the chlorinated tap, and only swap a sponge when it has genuinely broken down rather than on a fixed calendar.

Choose M, L or XL to fit your Bioflow chamber, and see the rest of our filter media. To understand the biology you are protecting, read our nitrogen cycle explained and beneficial bacteria guide.