Evaporation rates

[DBR_Reef]

I go through 10g a day during the winter, about a 1g during the summer. but my RODI is all automated, so there is no extra work.

 

[Roger D]

I've got two systems one is three forty gallon tanks on a 100 gallon sump and it looses 1.5-2 gallons a day and the other is a 180 with a 55 gallon sump and it looses 2.5-3 gallons a day. All open tops and leds. I don't use ato cause I check salinity before adding water. Almost had a crash when the valve on the fresh rodi failed to close completely.