what is a good PAR

I agree. Those numbers seem really high. I wonder what the PAR readings would be on a real reef. Would be nice to see a spectral analysis and PPFD readings at the depth of the ocean where certain corals thrive the most.
 
Yeah, those #'s are high. 600-1000 for acro's? My acro's are growing fast and look great in under 300 PAR.
 
markitekt said:
I agree. Those numbers seem really high. I wonder what the PAR readings would be on a real reef. Would be nice to see a spectral analysis and PPFD readings at the depth of the ocean where certain corals thrive the most.
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I have no print source to back this up, but the gentlemen (old CMAS member) I bought my PAR Meter from took readings on reefs all over the world. He said it wasn't uncommon to see 2000+ par on some of the brighter reef crests, but that they also saw coral thriving in shaded areas closer to the numbers we put out in our tank (200-400).
 
What about the difference in PAR vs PUR (photosynthetically usable radiation) I heard good PAR doesn't always translate to good PUR which is more important for coral growth.
 
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