I've done some searching but can't seem to find a definate answer. I bottled yesterday using a starsan for the first time that I mixed it up with RO water in a 1 gallon milk jug. I also picked up a bottle sanitizer that worked amazing and more than halved the time it previously took to sanitize bottles. Only problem is that it takes a lot of starsan solution to work properly and was just wondering if the used solution could be returned to a storage container and reused later as long as it remained clear and maintained its pH. I dumped it yesterday but I'm just curious for the future.