Not all of the common fish diseases are death sentences, but they can be very nerve-racking to deal with. To nip any illness in the bud, here’s how to prevent your freshwater fish from getting sick. Tank CyclingAfter you’ve cleaned and sterilized all your tank materials but before you have your freshwater fish, you’ll need to cycle your setup to promote healthy bacteria. Aquarium cycling ensures your tank can process the ammonia in your fishes’ waste, fortifies your tank against diseases, and keeps your fish stress free. There are many ways to cycle your aquarium, but plant cycling is the best…