You just need to make sure what you drip equals the rate of evaporation. If you drip too much your salinity level will go down as you are putting in more freshwater in the tank than evaporation is coming out. You also need to measure ALK
regularly. You want to keep your Ca
level above 375ppm and below 450ppm. You ALK
needs to be balanced with your Ca
My tank evaporates about 1-1.5 gallons a day. I can increase this amount, if needed, if I turn the fan on located over my sump so that wind blows across the water. This, in turn, allows me to dose more thus increasing the amount of ALK
being added to the system.