Alpine Bio-Pure Pressurized Filters Model:PLF2000 Will not harm fish or

Will not harm fish or burn a pond liner or plastic pond

and diffusers

Features 5" lip extension

You can loosen and retighten them by hand

Using a pressurized sprayer

Alpine Bio-Pure Pressurized Filters Model:PLF2000 Will not harm fish orThe Alpine Bio Pure Pressure Filters are small and can easily be hidden, so they are perfect for the owner of a small pond or water feature who wants clear water and a natural look. Multi stage biological and mechanical filtration Large foam surface provides increased filtration and allows beneficial bacterial to thrive Unique external pressure indicator lets user know if filter is performing properly Can be partially buried to keep unsightly