I've been draining & filling to lower CYA. Lately, with Ernesto & following rain showers, I have been draining while Mother Nature refills . I've drained a few inches at a time while there is a break in the rain. My question: Is it more effective to drain half way and fill or drain in smaller increments and fill? I figure you get more bang for the buck by doing one big drain, but my waste water winds up going down a slope into my neighbor's yard. Being a good neighbor, I don't want to make his yard a marsh. Maybe the real question is whether the incremental drains are effective at all?