How frequently do you have to add water to top off?

  • Since evaporation affects every single tank differently due to having lids (plastic, glass, etc.) or not, and the temperature difference from the aquarium water to the room temperature, how frequently do you add water to the aquarium to keep it at the same level?



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  • I mostly have to add water (about a gallon and a half) to my turtle tank every 3-4 days due to the open top (no lid), heat generated from the heating lamp, and a fan that is blowing from the vaulted ceiling like 95% of the time.


    All of my other tanks have lids, and maybe need 1/2 a gallon added to them once every 2 weeks or so.