glass canopy use

[md14fish]

was wondering who uses glass canopy ? or does this filter out to much light?

[kzickovich]

Do you mean hood? I took mine off it was holding in to much heat. When I took it off I had to top off more often do to evap. Plus it increased o2

[md14fish]

Yes the glass top. Thats what I am trying to weigh do you get more useful light without it and does that outweigh the increase in evap.
Just wondering what others do.