A week ago I posted pics about my Damsel that was later thought by concensus to be lymphocytosis. I went to my reef shop and they generously let me test out a product by
.:: No Sick Fish - Your source for quality fish products called "Velvet (Oddinium)" which I then applied one drop twice daily to the sump for 7 days as prescribed. I slowly watched the several white granules lining his fins disappear and today (Day 7) they are all completely gone. I am usually not one to testify for products, but this stuff worked. Only concern is it costs $50 for probably 3mL. But at 14 drops per infection I guess it would go a long way. Probably worth the $50 if you have some expensive fish suffering from Lymphocytis.