The bio-Dock prototype was tested continuously over three years. It was used with a boat that already had a year’s growth. It was clean within 48 hrs, a good test but the Bio Dock is intended to keep a clean boat clean. If left continuously, the cover will foul up but just reverse it and the Bio Dock cover will clean itself.
When the Bio Dock was removed after three years and the boat lifted out, the hull was free of any weed, slime or barnacles. No pressure washer needed and remember, the hull was fouling up when the Bio-Dock was applied.