Our replacement filter foam set is designed for use with all sump filtered aquatic racks.
These open structure fish safe foam pads provide superb mechanical filtration and provide an enormous internal surface area for beneficial filtration bacteria to grow. They can be rinsed easily in water to remove debris and ensure excellent flow through the foams. Depending on water chemistry and fish stocking density, a set should last from 6 months to a year before needing to be replaced.
The replacement pack contains 1x course foam and 2x medium foams.
We do not recommend replacing all three at the same time, but instead stagger changing them over a 3 week period, changing 1 sponge per week, in order for colonisation of the new sponge with filter bacteria.