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Unread 08/21/2008, 11:46 AM   #9
Dtip
Registered Member
 
Join Date: Dec 2007
Location: East Cleveland
Posts: 189
You'll really be hard pressed to find SW reefers that don't simply top off their tanks as needed instead of worrying about the evaporation rate. The downside is that your topoff water needs to be as pure as possible: any contaminants in the topoff will build up in concentration as pure water evaporates, but contaminates are added back with the replacement water.

At that point, only water changes can reduce the levels again. This is why many people opt for some form of filtration unit to produce pure water for topoff (and then also for salt mixes while their at it).


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