Pond Fish Care Unique Pond Fish For Your Backyard Pond Try some unique pond fish, instead of koi and goldfish. Buying Koi Fish Information on buying koi fish. Lymphocystis Disease in Your Pond Fish Lymphocystis disease is not an attractive condition in pond fish, but it’s also not fatal. Causes of Dropsy Symptoms What are the causes of the symptoms of dropsy? Coldwater Ich Disease or Pox on Carp The likelihood of koi having carp pox is rather, well, unlikely. Focus on Good Pond Fish Husbandry Don’t focus on diagnosing fish diseases but rather focus on taking proper care of your pond fish. Prevent Diseases in Pond Fish Before They Occur Quarantine fish, keep pond fish density low, ensure pond fish have space to hide, and keep the pond water clean. Performing Water Changes While Medicating Aquarium and Pond Fish Shouldn’t the fish medication be allowed to build up over time? Pacus for an Outdoor Pond? Large aquariums are expensive, so is a pond a good choice for a too-large fish? Keeping Tropical Fish in a Pond Keeping tropical fish in a pond depends on where you live.