Kids were climbing on the waterfall and accodentlybknocked over a tiki torch and oil dropped in the pool. Oil was visible on the surface. I added pool first aid. That seemed to have broken up the oil on the surface almost immediately. How long should I keep everyone out of the pool? Nothing on the bottle ifbpool first aid says anything about not to swim. I should add that other than the oil, the pool is safe to swim in. Thanks!