With the variety of treatments available, it can be overwhelming when deciding which treatment is needed for any particular ailment. This treatment finder will help narrow down your choices. A couple things to keep in mind when choosing a remedy is:
Type of tank - Some medications are designed for fresh water while others for saltwater,
Inhabitants - Some medications will be very hard on delicate animals such as inverts or many types of scale-less fish.
Course duration - Make sure that you purchase enough of the treatment to complete a full course. Even if the fish appear to be completely recovered it is very important to follow the directions as failure to do so could lead to the fish becoming re-infected by a treatment resistant ailment.