The Aqua Comb Cartridge Filter Cleaning Tool cleans pool and spa filter cartridges in as little as 5 minutes. The Aqua Comb with Short Forks is designed for cartridge filters with filter pleats around 3/4″ to 1 1/4″ deep. The Aqua Comb with Short Forks will work on filters with a smaller or larger pleat depths as well. The Aqua Comb is the perfect tool to get deep down into the filter pleats of pool and spa cartridge filters to remove the stuck in debris such as bugs, vegetation and other debris that accumulates in your filter. Attach the Aqua Comb to a standard water hose.