I am going to echo and disagree with some here at 24" deep a normal 250 is not enuf for high light corals unless they are all in the top 1/2 of the tank. a good guide line is 18" 250 watt, 24" 250 HQI or 400 watt. I would recomend the 250 watt HQI over the 400 watt and I would also sugest you get normal 250 watt single ended bulbs and only the HQI ballast.
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*
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