<a href=showthread.php?s=&postid=11593543#post11593543 target=_blank>Originally posted</a> by cd77
I don't think it's necessary, though some people believe it is an immune system booster of sorts and helps to prevent ich. Fish do like it though, and it can be helpful if you have a fish that's not eating. I'll add a drop of "garlic xtreme" (drsfostersmith.com carries it) as well as Selcon on occasion to a frozen cube.