Groovy is specially designed for tough and intense fouling. It occurs more frequently in saline water or boats that are often standing still. Groovycleaning head is an accessory* to Scrubbis Hull Scraper SET 86102, by replacing the regular head. Groovy Head has a built-in buoyancy force of 2 kg / 4.4 lb and is fitted with a coarser brush that more easily removes stronger and stubborn fouling. The bristles of the brush is slightly inclined to be gentle on the hull, but hard enough to remove stubborn fouling. For best results, we recommend that you use the Regular Head in Scrubbis Hull Scraper SET afterwards to remove remaining debris and mucus.