Quote:
Originally posted by cardiffgiant
What ever you do, I would NOT add salt directly to the tank. The end result will be more difficult to calculate and correct (if too much is added), and the unmixed salt can irritate fish and corals as it dissolves.
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Good advice there. Instead of freshwater for evaporation topoffs, use saltwater. Not excessively salty water, mind you, saltwater with the salinity you are looking for. Eventually the level will correct itself, then go back to freshwater topoffs.
Good luck,
Joe