Atlantic’s FilterFalls are not only the perfect complement to Atlantic Skimmers, they offer performance and upgradeable filtration options that every pond builder will appreciate. Massively strong, with spacious interiors that accept up to six Matala filter mats and a variety of available biomedia, these solid workhorses provide the ultimate filter solution from newly installed to even the most heavily stocked ponds or water gardens! Big Bahama FilterFalls - 19" - with 2" Bulkhead - Biological Filter for your pond or water garden creates the conditions for beneficial bacteria to grow in your spillway. The BF1900 comes standard with a sturdy bottom grate, two Bio-Tech filter mats, a Media Bag for Bio-Tech media, support bars, and heavy-duty removable top grate. Complete with a lifetime warranty on the enclosure, your water feature will be built to last.