I have a 90 gal tank with an approximate 30 gal sump and I was wondering what the avridge water evap a day is. The house has been at about 83 84 during the day for the past week week and a half cause the ac is broke. Not sure what the tank gets up to during the day because I am at work. When I get home it's at about 80 81 normally tho. I loose about 2 gallons a day in evap. Is that normal. I can't find a leak anywhere and I know the tank is good.