Ulcer treatment
 

my pond is in Scotland UK and I have recently suffered problems with ulcers.
lost 6 fish to date. I have tried the remedies available in pet shops to no
avail. I have taken my large Koi to the vet to be injected with antibiotics
but catching the smaller fish is almost impossible. Probably have 6 fish
still infected, varying from goldfish, shubunkins and comets. My pond is
well established 10+ years and this is the first fish that I have lost for 5
years. Water quality is good.

Best regards
John

PS this is my first post ever on a newsgroup.