Mh help!

[EB847]

I am retrofitting a 150 watt de (hqi) into my hood. I need to replace my acrylic shield that inserts into the hood. I have been told, tempered, low e, etc. What kind of glass usually comes with a mh fixture? I have a .25" lid now. Help!

 

[Unarce]

I've normally seen them come with tempered glass, if I'm not mistaken. You definitely don't want to use acrylic. It will eventually warp, yellow, and may melt into that frost look.

 

[EB847]

I was told tempered glass blocks uv to prevent damage to people or tank inhabitants. I was also told that temp. glass does nothing of the sort. If it doesn't, wouldn't any clear glass do?

 

[Unarce]

Not sure. I haven't heard before that it doesn't.

 

[EB847]

http://www.aquarium-design.com/reef/uvlighting.html

NOW I'M EVEN MORE CONFUSED. MAYBE I WILL JUST SET A LAMP NEXT TO THE TANK.

 

[Unarce]

It seems to be a popular article in this thread.

http://www.reefland.com/forum/showthrea ... ge=1&pp=20


It's a bit lengthy, but you'll get to the good stuff by page 3. There's also some specifics provided by a glass company of UV transmission.

All this seems to suggest that glass does a decent job of blocking UV. Regular glass would have the same property, but tempered glass is more suited for the heat.

 

[Rotary]

Glass and tempered glassfilter the same amount of UV rays out.. Either will work for HQI. THe only diffrence is tempered glass is much stronger and will handle more heat.

 

[Rotary]

Glass and tempered glassfilter the same amount of UV rays out.. Either will work for HQI. THe only diffrence is tempered glass is much stronger and will handle more heat.