I use half a capful of Aqua Plus to condition 2 1/2 gallons of tank water at a time before adding it to the betta tank (a ten gallon tank). I have a simple question, though, that I can't seem to find the answer to (including on the label): how long should I let the water sit after pouring in the Aqua Plus before adding it to the tank? I asked the guy at our pet store and his answer was "some people say you can add the water immediately, some people say 20 minutes, some people say a day." Not much help.