Does everyone have this problem. I mean every 3-4 days about 3-5 gallons evaporate and I do not have an RO sysstem. I have no cover on the tank and 2 65 watt actinic and 2 65 watt of the other bulb. What can I do?
Make sure to check your salinity level too... Water evaporates but salt is still there. I like to add treated freshwater (VERY SLOWLY THOUGH) to the SUMP when the water evaporates to make sure salinity isn't too high.