peeling skin?

[kturner]

THREE MONTHS AGO I HAD SOME LARGE GOLDFISH I TOOK FROM A VACATED POND
I PUT THIS FISH IN A 130 GAL GALVANIZED STOCK TANK.I SET UP A FILTER AND ALL SEEM FINE
AFTER A FEW WEEKS SOME STARTED PEELING SKIN LIKE JUST FALLING OFF.A FEW DIED I
REMOVED THE OTHERS TO ANOTHER HOLDING TANK.I STARTED TO PUT THEM BACK IN THE
GALVANIZED TANK THEY WERE FINE.FEW WEEKS LATER SAME THING THE ONES I PUT IN MY
ACTUAL POND ALL ARE FINE WITH MY OTHER FISH WHICH I HAVE HAD FOR A YEAR OR SO.IM
NOT SURE IF THE GALVANIZED TANK CAUSED THE FISH TO DIE OR NOT.ANY IDEAS ON WHAT WOULD
CAUSE THE SKIN TO COME OFF.

 

[fishin4cars]

Sounds like the tank may have been coated with something that is drastically changing some type of water quality. First guess sound like a major ph swing but it could be a metal leeching that is causing the problem. Best bet is discontinue use of it as a fish pond. It probablt won't effect plants the same way.