I store RO water in a 15 gallon container using occasionally for top off and water changes. Also I store 25 gallons saltwater mix (heated, airated and circulated) for 10-14 day periods. Is this too long?
Should not be a problem esp since you keep it mixed and airated. I do not see the need to keep it heated the whole time. Just make sure the temps are close when it is time for the water change.
