Timothy Tom wrote:

I read the recent post regarding Mr. 4000 and the possibility of
salt/evaporation problems causing him grief. I have never noticed any
problems from evaporation or salt in my home from my 150 gallon tank.
Has anyone else had a problem with larger tanks?

Yes, I have. I have 6 tanks, three of them uncovered by glass because
they are for frogs, toads, and turtles, the other three covered, about
350 gallons all totalled. The humidity coats all windows in this
weather so I have a humidistat fan in the attic and I leave the closet
door and attic open to take care of the dampness. Unfortunately I
didn't realize I should close the basement door because the gas furnace
couldn't pull in enough air when the fan was pulling the same air in the
other direction. It cost quite a bit in unnecessary professional
attention before we all understood the problem. So now it's open
basement door and closed attic during the day and closed basement door
and open attic at night. Now the humidity is manageable.

Ruth Kazez