Originally Posted by solarscar
I ask this since i am pretty sure that salt doesn't evaporate so when the water level goes down due to evaporation i assume the salt level rises, therefore topping off with some RO would bring it back into spec. I am right on this?
yes, but you do need to keep track of your specific gravity levels. as you may do some things such as priming filters, etc. also, salt can leave the tank as "salt creep." don't assume that your levels are always the same.