Can you provide references to back this up?
There has been a huge amount of debate on British websites about the use of garlic. This is from Ultimatereef written by their Fish health advisor (Wombat a PhD in fish health).
My research and it is real research using controls and done in my laboratory (I say my laboratory because it really is, I run it and oversee the research that comes out if it as the professor in charge of it) clearly shows that garlic fed long term has no benefit on feeding response, nor is it an immunostimulant in fish (see Bricknell, I. & R. A. Dalmo. 2005. The use of immunostimulants in fish larval aquaculture. Fish Shellfish Immunol., 19: 457-472) and the scientific literature does not show that it cures white spot. However Like any scientist if people come along with the data I like you would be very happy to reconsider my opinion, but I've yet to see that data.
Here are a few scientific papers.
Bell JG, Dick JR, McVicar AH, Sargent JR, Thompson KD 1993
Terrestrial and fish oils affect phospholipid fatty acid composition, development of cardiac lesions, phospholipase activity and eicosanoid production in Atlantic salmon (Salmo salar).
Prostaglandins Leukot Essent Fatty Acids. 49(3):665-73
Bell JG, McVicar AH, Park MT, Sargent JR.1991.
High dietary linoleic acid affects the fatty acid compositions of individual phospholipids from tissues of Atlantic salmon (Salmo salar): association with stress susceptibility and cardiac lesion.
J Nutr. 121(8):1163-72
J. Gordon Bell2, John McEvoy3, Douglas R. Tocher, Fiona McGhee, Patrick J. Campbell* and John R. Sargent 2004
Replacement of Fish Oil with Rapeseed Oil in Diets of Atlantic Salmon (Salmo salar) Affects Tissue Lipid Compositions and Hepatocyte Fatty Acid Metabolism
The American Society for Nutritional Sciences
J.G. Bell1, D.R. Tocher1, B.M. Farndale1, A.H. McVicar2 and J.R. Sargent1 1999
Effects of essential fatty acid-deficient diets on growth, mortality, tissue histopathology and fatty acid compositions in juvenile turbot (Scophthalmus maximus)
Journal Fish Physiology and Biochemistry 1573-5168 Volume 20, Number 3 p263-277
SL Seierstad, TT Poppe, EO Koppang, A Svindland, G 2005
Influence of dietary lipid composition on cardiac pathology in farmed Atlantic salmon, Salmo salar L
Journal of Fish Diseases,[/font]
This also makes interesting reading
http://www.reefkeeping.com/issues/20...ture/index.php