The only time we have any issues with high evaporation is summer with
central air and winter with the wood stove. But I don't mind it to much
because both systems dry out the air so much that we needed to run a
humidifier till we added more fish tanks in the house. I monitor four
tanks daily and add water as needed. But then it is not much of a choir
because I love to do it anyways. Plants need pruning, algae wiped off
glass and so on.

Vicki

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?