Yea. There are a lot of corals that are more difficult to keep under MHs. Forget any types of musrooms or anything like that. Polyps and such can be kept if you keep them in a cave or at the very bottom of the tank. LPS are much more difficult to acclimate to MHs, and IME, dont do well under them (although some on the list have kept them with MHs just fine). If you keep LPS under mhs, you have to really give them time to acclimate. Softies can be kept, but should be kept low in the tank (a couple species do well high in the tank under mhs though). Clams and SPS will love them.
That being said, my MH is quite close to the water. About 10 inches from the top of the water to the bottom of the bulb. Yours will be higher, and that will help. It is just something to consider when purchasing and placing your corals. IMO Shane C. > -----Original Message----- > From: Culross, Andrew [SMTP:[EMAIL PROTECTED]] > Sent: Thursday, November 08, 2001 2:05 PM > To: [EMAIL PROTECTED] > Subject: RE: Lighting question > > I'm not sure at this point. I just that the MH provided me with the most > flexiblity. > > Is their anything that I shouldn't keep under MH ? > > -----Original Message----- > From: Shane Clays [mailto:[EMAIL PROTECTED]] > Sent: Thursday, November 08, 2001 4:02 PM > To: '[EMAIL PROTECTED]' > Subject: RE: Lighting question > > > Hhmmm, should be okay. Elevating the hood will help a lot. You can also > install a nice little icecap fan in it and have it blowing hot air out, if > heat becomes an issue. What are you planning to keep in the system? > Dealers > were right, not much difference in heat. MHs are good lights, but depends > on > what you are going to be keeping... > > Shane > > > -----Original Message----- > > From: Culross, Andrew [SMTP:[EMAIL PROTECTED]] > > Sent: Thursday, November 08, 2001 12:17 PM > > To: [EMAIL PROTECTED] > > Subject: RE: Lighting question > > > > The hood is fairly open (back is open, slats on top) and I plan on > > mounting > > the assembly close to a foot above the water. I have 2 40W light right > now > > sitting right on top of the tank. > > > > Temp right now is not an issue. I have a temp controller that turns on a > > fan > > that blows across the top of the tank. This only runs in the summer. I'm > > praying that I don't need to do more with this lighting upgrade. > > > > I talked to several dealers before ordering the lights. Some indicated > > that > > the heat differential was not going to be much if anything between the > > VHO, > > PC, or MH setup. Since the MH setup is the preferred lighting > arrangement > > (don't flame me, it's a general accepted truth !) I went with the MH. > > > > Right decision ? > > > > -----Original Message----- > > From: Shane Clays [mailto:[EMAIL PROTECTED]] > > Sent: Thursday, November 08, 2001 2:10 PM > > To: '[EMAIL PROTECTED]' > > Subject: RE: Lighting question > > > > > > There are so many factors, it is impossible to tell. Room temp, temp > > outside, enclosed or open hood, fans on the hood and or blowing on sump, > > any > > direct sunlight, temp of tank right now w/no lights etc. I would guess > > (and > > I mean guess), you are going to get 2-3 degrees increase. You can > counter > > that with fans blowing on your sump and or in and out of your hood. If > you > > already have fans and your temp runs in the high range, you might be in > > trouble. > > > > Shane > > > > > -----Original Message----- > > > From: Culross, Andrew [SMTP:[EMAIL PROTECTED]] > > > Sent: Thursday, November 08, 2001 12:05 PM > > > To: [EMAIL PROTECTED] > > > Subject: RE: Lighting question > > > > > > Yep, that makes sense. > > > > > > I guess my question is, what do you expect the temp rise to be ? > Minimal > > > (I > > > hope) ? > > > > > > -----Original Message----- > > > From: Shane Clays [mailto:[EMAIL PROTECTED]] > > > Sent: Thursday, November 08, 2001 1:53 PM > > > To: '[EMAIL PROTECTED]' > > > Subject: RE: Lighting question > > > > > > > > > Yea, but only becuase it is more wattage. A watt is a watt, and the > heat > > > from one watt is as hot as that from another. You are looking at 480 > > watts > > > on the MH, 440 from the VHO and 384 from the PCs, thus the PCs are > going > > > to > > > be the coolest running. > > > > > > FWIW > > > Shane C. > > > > > > > -----Original Message----- > > > > From: Culross, Andrew [SMTP:[EMAIL PROTECTED]] > > > > Sent: Thursday, November 08, 2001 11:45 AM > > > > To: [EMAIL PROTECTED] > > > > Subject: Lighting question > > > > > > > > I plan on installing a retro lighting kit into my aquarium hood. I > > have > > > a > > > > 120G All-Glass Modern > > > > > > > > I ordered a hood with 2 175W MH and 2 65W PC > > > > > > > > In your opinion will this hood increase the water temp more that 4 > 96W > > > PC > > > > or > > > > 4 110W VHO ? > > > > > > > > Andrew Culross > > > > OPICS Product Center > > > > 914.821.2572 > > > > > > > > This email may contain confidential information intended only for > the > > > > person(s) addressed above. 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