Reflector.

[fishboy]

Bruce,

Does your tank have a center brace? Mine does and it cast a bit of a shodow. Also I'm a bit worried about the heat of the MH if I mount it over top of it. I was thinking of cutting it off [img]images/smiles/icon_confused.gif[/img] . The tank is a 54 gallon Hagen and the bigger Hagen tanks I've seen(a bit longer) don't have the center brace and the plastic cap appears to be the same as mine(thickness, highth etc.).

Any thoughts on how large a fan I should put with the 250W MH? I was thinking around 60 CFM?