Juwel BioPlus M Fine Sponge for Bioflow M (3.0). The Juwel Compact Fine Sponge Filter Media is designed to remove small to medium sized particles and within its design allows bacteria to flourish and multiply down to its large surface area. It is recommended to change the BioPlus Fine sponge every 3 to 9 months to keep your filter running as efficient and possible. Suitable for JUWEL Rio 125, Rio 180, Rio 240, Vision 180, Trigon 190, Lido120 & Lido 200.