If you struggle with floating algae or sludge in your pond, the problem may be your filter media. Designed for ponds and even freshwater and marine aquariums, Sera Pond Crystal Clear Professional Filter Medium features an innovative, patented 3D fiber structure that’s compatible with all filter types to quickly remove fine particles above 10 µm. Long-lasting mechanical filter medium treats 1,585 gallons of garden pond water (or aquarium water).
Even better, these high-performance filter balls keep their shape and are up to 80% reusable. For consistent high filter performance, simply wash out the filter balls, replace 20% of the filter balls with fresh ones, and put them back in the filter. It really is that easy to achieve cleaner, clearer aquarium water!
Care Instructions: As needed, thoroughly rinse filter balls in clean water. Replace 20% of the used filter balls with fresh filter balls for optimal performance.