If you buy fish from feeder tanks, make sure you treat them for parasites
before putting them into your pond. I was so excited last week to find baby koi
in the feeder fish tank and so i bought some. They infected my 2 ponds and my
nieces pond with ANCHOR WORMS and ICH! The good news is, the pet store that I
bought them from gave me all the medication to treat all 3 ponds.