My system doesn't have a backwash to "waste" setting only run and backwash. Can I remove my filter grids (so they dont get damaged) and set me system to "backwash" and use my vacuum to to section out the heavy "moon dust". I would also turn on my hose to add water so as not to let my water get below the skimmer line. Currently replacing my booster pump for my shark that would normally take care of this.