I think that mostly pertains to surface agitation at that point. Because I can't see everyone running monster tanks from 220-700g having fully covered and filled tanks. So the moisture release should be equivalent for a certain sized pond. Or what about the many people that have multiple tanks. I have 2 and am about to have a 3rd up and running. I have no dehumidifier.Don't know many specifics, but I believe the biggest problem people run into long-term is humidity build up. You'll need to deal with that, and you could do so through ventilation, dehumidifiers, and/or covering the tank properly.