When my fiance and I do water changes for our betta, we use water that we've aged in an old one-gallon milk jug. Usually we add the water conditioner to the water after we've cleaned Rakki's bowl and added the new water, but this last time we decided to add the water conditioner to the jug after filling it with new water for aging. The thing is, we have two of these jugs, and since Rakki is in a one-gallon bowl, we change his water 100% twice a week, which means the water sits in the jugs for about a week before being used. And I'm not sure how long water conditioner stays... active?... if there is no fish living in the water.
What I'm trying to ask with this rambling post is this: Is a week too long to allow water to age? Was it pointless to add the water conditioner to the newly-refilled water jugs which will be sitting for a week before being used? Would we be better off going back to adding the water conditioner after putting the water in the freshly-cleaned bowl next time? If so, should I dump the water currently in the jugs and start aging a fresh batch of water?
Thanks for any replies.