Pond Boss Forums MANAGING AN EXISTING POND Feeding Feeders/Sweeney, Native Outdoors

Bruce - The external parasites could be fish leeches. Can you collect any and kill relax them by freezing in a little water?. Then preserve them in alcohol (isopropyl or ethanol). Or you might try killing- relaxing them by heating them in hot water then preserve them when they are dead. I think temps between 120 & 180 should kill them. However heat may cause them to "ball up". Putting them directly in alcohol will cause severe contraction and I willnot be able to identify them very well when contracted into a "ball".