I need to get into the pool to do some scrubbing and vacuuming due to recent algae. Is it an issue to get in to do that while the chlorine levels are still high from the double shock I've done (two days ago)? The only "vacuum" I have isn't really a vacuum, it doesn't hook into the filter or anything, just uses a little bag and garden hose. Is this even going to do anything to help the alga situation?