Calculate t he number of fluid ounces per day:
1 fluid ounce every 30 seconds = 2 fl. oz every minute.
2 x 60 = 120 fl. oz. per hour.
120 x 24 = 2880 fl. oz per day
Now convert fluid ounces to gallons:
1 gallon = 128 fluid ounces.
2880 fluid ounces / 128 = 22.5 gallons per day.