I do not know if this will help, because I have only used it for quite a while as a preventative measure, but I feed red gracilaria. Macro algae has been reported on numerous occasions to help improve the immune system because of beta-carotene and is a healthier choice alternative for tangs and angels. (My foxface loves it as well!) Many reports state that it directly helps prevent HLLE. Additionally, it acts as a scrubber for excess nitrates and phosphates.