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#1
10-24-2010, 05:42 PM
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ok, so one problem here.. if you only go with 3 bulbs then you will have to lift them up to around 16" or more to get an even spread across 8 foot.
since you are lifting them the PAR values are going to drop in the tank and you are also thinking of dropping down to 250's . 250 watt is not always a down grade from 400's but with the ballasts you are looking at ya they are. so now you are lowering your PAR even more. I recomend that you stay with 400's if you want 3, or go to 4 MH if your dropping to 250's on an electronic ballast. I would personaly go with 4 bulbs either way, but I also like lots of PAR. Steve
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 *everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*Some strive to be perfect.... I just strive. Last edited by StirCrazy; 10-24-2010 at 05:44 PM. 
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#2
10-24-2010, 05:56 PM
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Quote:
I agree. 3 bulbs/400W 4 bulbs/400W or 250W
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225g reef
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#3
10-24-2010, 06:36 PM
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My 750 is 8feet long and 5 feet wide, I am only using 2x175w single end in Lumenmax Elite reflectors with 2 6 foot VHO flourescents for supplementation (all about 16" above the surface), I have not checked par but there is no shaded spots and the tank looks pretty well evenly lit, granted it is a FOWLR but there is one anenome in there that is doing well, If I ever switched it to a reef I think I would add a third reflector and bump it to 400w, it all depends on bulb choice and reflector type IMO, I am running 3 400w SE on the 300 reef and the 750 still looks brighter visually, again I do not have a par meter to compare the important numbers.
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#4
10-24-2010, 07:21 PM
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i have 2 400's over the 5 footer and its 16" and i have overlapping all corals seems happy to me i guess.
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180 starfire front, LPS, millipora Doesn't matter how much you have been reading until you take the plunge. You don't know as much as you think.
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