JBL CristalProfi e700/e900 UniBloc Biological Filter Foam

JBL CristalProfi e700/e900 UniBloc is a biological filter foam for the middle baskets of an external filter.

It is made for JBL CristalProfi e700 and e900 external filters.

The pack holds 2 foams. According to the manufacturer, JBL foams are tested for harmful substances and release none into the water. First colonisation of new filter media with bacteria takes about 1–2 weeks in freshwater and twice as long in seawater. Adding concentrated filter bacteria, for example JBL FilterStart, shortens this to about 24 hours.

For many months it is enough to rinse dirty foams under warm running water and seed them with filter bacteria (JBL FilterStart) before putting them back. Since mechanical cleaning never removes all the dirt, JBL recommends replacing the foams about every 6 months.