Treating wounds on fish can be just as stressful for the owner as much as the fish! There can be nothing more infuriating than an ulcer on a Koi.
The secret to successful treatment is to catch the problem early and do something about it. Only in exceptional circumstances will a Koi have the ability to heal without treatment. Also a certain amount of persistence is required. It is quite common to do extra treatment as necessary.
Most pondkeepers know that the best way to ensure clear pond water is with an ultraviolet sterilizer. Some often overlooked factors are what to do when the UV light is not doing the job anymore. Usually, this is a simple as an old lamp. Depending on the brand, UV lamps should generally be replaced about every 12-15 months of use.
