Also, a serious question I have/dilemma. I do my best to keep the pool clean but since previous owner had a lot of landscaping, dirt and runoff finds it's way into the pool. Often spreads around in small spots and while I try to brush, it can spread again next day. I have a manual vac, but with how big the pool is, one vac session loses a few inches of the water. Is this inefficient? Does vacuuming to waste cause water significant chemical loss, and filling with new several inches affect chemistry a lot? A robot vacuum has been expensive to consider but might be open to it if that's my only solution.