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#1
10-20-2010, 01:41 PM
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Myka i do partially agree with you. Some people are too concerned with par but I was just stating what I have read from research articles and test done with Par and coral growth. It is a fact that most sps or corals in fact will grow faster with more light aka higher par numbers. But there is a limit to this, after a certain point they become saturated and photo inhibition will occur and it can be harmful to the coral. 600 par is not that high, and 100 is actually very low. Put a sps frag on your sand bed vs. 4 inch from the surface and see which one looks better and grows faster.
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#2
10-20-2010, 05:23 PM
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Chris, I have only two SPS corals that would handle being 4" from the surface under my lights (a tabling Acro and a Candlelight Acro). They are halides, but the fixture is Chinese and the bulbs are from Home Depot (came with fixture). It is a 36" fixture over a 48" tank too. It has two T5s (UVL Super Actinic and KZ fiji Purple right now). Needless to say, this setup isn't high output by any means. I have Stags and Milles on the sand in my 24" deep tank that have better color there than higher up. All my LPS corals are off to the side away from the halides. My water is crystal clear though, so that makes a huge difference.
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