Vitamins/Herbal Remedies: Used to boost a fish’s immune system, supplement dietary deficiencies, promote healing and improve overall health. How To Treat - The following are examples of vitamin supplements in which fish food can be soaked: Selcon, Zoecon, Vita-chem, Seachem Vitality, Brightwell Aquatics Vitamarin-M & AminOmega, Aquaforest Fish V. DIY options include: Vitamins A, C, E; folic acid; amino acids; Omega 3 & 6 fish oil; Krill oil; Beta-glucans. Since all of these are "reef safe" substances, you can just saturate food with them or use Seachem Focus to bind them to the food. Also, probiotics are very important for your fish's digestive system. Probiotic Marine Formula and LRS Foods are two options for providing probiotics. I once saw a thread (with pictures) of a Purple Tang with a bad case of HLLE, where the condition was completely reversed by using Selcon & Zoecon on alternating days; in addition to feeding nori. The value of feeding nori cannot be overstated, as it contains high levels of iodine and fiber. In addition, the use of vitamins and nori is key to alleviating symptoms of viruses in fish, such as Lymphocystis. All of the above will aid in boosting your fishes’ immune systems. Soaking food in garlic extract may or may not be useful, except that it does seem to stimulate appetite in new fish. The “pea trick” is something I want to briefly touch upon. A fish with constipation may look similar to one with a swim bladder disorder. The latter is difficult to treat, so always try the "pea trick" before considering a venting procedure. Just feed 1 or 2 peeled boiled green peas (same kind you & I eat) for a few days. It is thought that the fiber contained in the peas help to “push things out.” There are a slew of herbal remedies on the market and many hobbyists mistakenly believe that these will “cure” their fish or tank of some disease. Although they are not capable of doing that, these remedies may help manage the symptoms of a disease - sometimes indefinitely. Herbal remedies accomplish this by boosting a fish’s immune system to withstand the symptoms, until sometimes acquired immunity develops. However, these "immune" fish oftentimes are still asymptomatic carriers, capable of transmitting disease to non-immune fish. Employing this strategy sometimes works, sometimes not; or sometimes it works for a while and then stops (and the fish dies). It’s largely dependent upon the overall health of the fish (and the tank in general) as well as the severity of the disease being “managed.” Utilizing a UV sterilizer (or diatom filter) to reduce the number of free swimmers in the water helps as well. Examples of herbal remedies commonly available include: For parasites/worms: Herbtana, Fritz Aquatics Parashield, Kick-ICH For bacterial diseases: Artemiss, MelaFix, PimaFix Dips & baths: Seachem ParaGuard, Ruby Reef HydroPlex More info here: A discussion regarding herbal remedies Pros - Reef safe, improves overall health of your fish, may buy you time until a proper treatment (using medication) can be done. Cons/Side Effects - May lure a hobbyist into a false sense of security, which can delay real treatment options.