what exactly did you think you could do without topping off? and what are you using to test the tap water that leads you to believe that the levels (levels of what?) are perfect?I know about evap, I just thought i could do something without using top off.
That will happen during the winter months because the air in your house is dry and the water temp is warmer than the air. You could add RO water only. I have to add 2 gallons ever 2 to 3 days.
I do not know what size tank you have but you should not wait to the point of having to add 2 gallons before you are topping off. In a small tank, you will have a large salinity swing if you are 2 gallons 'low' on your water. Top off should be done on a daily basis, usually more often than once per day on a larger system.I have to add 2 gallons ever 2 to 3 days
Yea you could empty the tank and then you wont have anything to worry about...I know about evap, I just thought i could do something without using top off.