Insert a filter with a phosphate remover for the JBL CristalProfi i device.

Main Features:
• Solves algae Disorders by removing phosphate nutrients from aquarium water.
• Simply insert the filter cartridge into the filter basket of the JBL internal device (CristalProfi i 60, 80, 100, 200) instead of the filter sponge.
• Completely ready for use with the internal tube. It can be refilled with JBL PhosEx ultra if necessary.
• Replace it after 2-3 months or check the phosphate content using the JBL phosphate test and use a new filter insert if the phosphate level rises again (or refill it with JBL PhosEx ultra).