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Old 11-10-2003, 12:34 AM   #1
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Another MH question

I am going to retro my canopy over to a MH/VHO atenic lighting system from a VHO only system. My tank measures 48x20x20 and I have a 20 gallon wet/dry with a protein skimmer. I have 100lbs of LR and am going to add 50 more lbs after the lighting change. Livestock is as follows until the upgrades are completed. 3 Damsels, 1 Percula, 1 cleaner shrimp, 5 turbo snails, 10 blue leg hermet crabs, 1 branch frog spawn coral and 1 flower pot coral (goniropora). All are healthy and like the current lighting.

I want to get some more light dependant creatures and that is why I want to upgrade.

The LFS recommends 2x400 MH. That sounds extreme to me. What do you all think? I was thinking that 2x250 sounds more inline for my setup.

Any advice is welcomed. Thanks in advance,

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Old 11-10-2003, 01:27 AM   #2
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i would go with at least 250's cause with the depth of 20" the 175's won't penetrate to the depth of your tank well enough but the 250's would do fine. now myself i like to do things with a bit of overkill so i would do 400's. but that is just me. shop around though before you buy because you can find some great deals on ballasts. myself i got mine from:
they ship out very quickly. but i recommend getting a mounting kit someplace like hello lights.

"The brighter you are, the more you have to learn."
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Old 11-10-2003, 02:36 AM   #3
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I personally think that 400watts is WAY too much.. I think that most inhabitants would be cooked.. JMO.. If you ran 2x400w lights with lets say 2 VHO that would be 1020 watts for an 80gal tank... I would think that if the tank was lets say 30" high that it would be able to be justified to have 2x400 on it.. But maybe one of the Advisors might shine their opinion on this as I dont have Jack of experience compared to them..

Master James
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Old 11-10-2003, 08:57 AM   #4
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I'd do 2 X 250W

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