Anyone with sump closed inside stand?

[Rikko]

I have a fully enclosed sump with virtually zero air movement out of the stand.. I get a very tiny amount of mold that needs wiping every few months (at best), so for me it's not a big issue.
My only big complaint is that it does warm the tank up overall - in the summer I leave the doors wide open and the temperature is a good 2 degrees cooler. The majority of the year it's not really an issue.