I definately recommend stocking up on different medications to have on hand. Prazipro, Seachem Paraguard, Seachem Focus (for binding metroplex to food), Metroplex, and Kanaplex, Furan 2, formalin, malachite geen, or quick cure which is a mix of formalin and malachite green, methylene blue, pimafix and melafix are first step treatments always because they are very safe herbal meds and can be used on the most delicate fish but if these fail then second step treatment is required, cupramine (Seachem copper test kit is good for testing, must be tested often as there is a small therapeutic window to be effective. The website for the american aquarium products literally has information on every fish medicine that you can think of. Great resource.