400W MH's inhibiting Photosynthesis......

[Diomedes]

First of all, "Reduced Photosynthetic Activity" is not necessarily a bad thing. When there is a high degree of light, there isn't a need within corals to have a large amount of zoxanthellae. This is because there is sufficient light to run these little zoxanthellae sugar-factories at high efficincy. Therefor at high light levels there would likely be a reduced photosynthetic activity...the coral will purge itself of excess built up zox that it may have gained during a low light period. This would register on this woman's meter as reduced photosynthetic activity. It is well documented that too many zoxanthellae running at maximum efficiency will poison your corals with the waste products (02-day, CO2-night). Also - measuring photosystem II's byproducts and from there extrapolating an change in Rph (Rate of Photosynthesis) is a difficult thing to do theoretically because of the natural flux of these byproducts. This sounds fishy to me...until I hear more proof we should take this Dana and rocket her off to the sun so she can measure the effects of too much light intensity on human tissues. :cool:

Stephen