Have to get humidity down: glass tops or canopy?

[kien]

If you own your home and plan on having that tank for a while then I would suggest looking into and HRV.

The glass top will cut down evaporation but will also need to be cleaned very often. It'll become a chore that you will dread. The glass top will also trap other harmful gasses that the tank exhausts. I would never recommend a glass top.