A device includes a plurality of buoyant support members having a plurality of cavities formed therein and are provided with a plurality of pivotal access panels to access the cavities. A plurality of elongated rocker arms and a plurality of associated scrubbing assemblies are operably attached thereto. Such rocker arms extend inwardly from the support members and are laterally adjustable such that the scrubbing assemblies can be positioned along alternating planes during operating conditions. A plurality of hydraulic separators are positioned between the support members and include associated pistons secured to the support members such that a spatial relationship between the support members can be adjusted. A mechanism, partially disposed in the cavities, is included for effectively discharging a volume of fluid through the scrubbing assemblies towards the boat hull.