Have a 240 gallon rimless aquarium that plan setting up.(8x2x2) with a large 50 gallon sump below. It will be on a reinforced crawlspace and an exterior wall.  I am getting close for it to be ready, however, want to make sure I dot every I and cross every T. Today I woke up thinking about humidity. Lol.
I was looking at installing a exhaust fan that will duct into the Sump area and out of the home. However, being a rimless tank I’m concerned if it’s actually going to do that much to help with humidity. 
I know I could do a dehumidifier or a HVAC based system. However, I am trying to be as energy efficient as possible.  anyone have any thoughts, concerns, or general opinions on this topic? 
I was looking at installing a exhaust fan that will duct into the Sump area and out of the home. However, being a rimless tank I’m concerned if it’s actually going to do that much to help with humidity. 
I know I could do a dehumidifier or a HVAC based system. However, I am trying to be as energy efficient as possible.  anyone have any thoughts, concerns, or general opinions on this topic?