<a href=showthread.php?s=&postid=10575084#post10575084 target=_blank>Originally posted</a> by Mark C
The benefit of amino acids has been known for awhile, its just that most people couldn't have kept a nutrient free tank long enough to even worry about it... Here is the abstract of an article from the Dec. 1991 edition of the Coral Reefs journal by Ferrier:
"High pressure liquid chromatography was employed to provide the first definitive proof of the net uptake of dissolved free amino acids (DFFA) at nanomolar levels by four scleractinian corals (Montastrea annularis, Madracis mirabilis, Agaricia fragilรฦรยฌs, and Favia fragum). During 2 h incubations all species exhibited simultaneous net uptake of eight amino acids. For M. annularis and F. fragum uptake of some dissolved amino acids occurred at concentrations lower than those found in reef waters. Microbial activity or adsorption of DFAA to exposed coral skeletons during these experiments did not appear to be important. Although it seems unlikely that DFAA uptake can provide a significant energy source for corals under ambient condรฦรยฌtions, it may be important in the acquisition and retention of nitrogen by these animals."
The last line is the important one for reefkeepers... It basically implies that in a nutrient deprived tank, dosing amino acids could lead to better acquistion and retention of nitrogen, which in turn can enhance their color.