Adironack Pond I have trout issues right now too. Not sure what it is but my brook trout are stressed after I cranked up the well this spring. Either iron or a PH change or both. Some are off feed (feeding less) and hanging along the edges of the pond. I think this has happened before when I exclusively had brook trout, and if so they will adapt but I may lose a few. I'm feeding them a broad spectrum antibiotic known as romet for five days to see if it helps. If it's iron it's irritating their gills and may cause a bacterial infection.
My brown trout never gave me problems like this. The brookies are apparently more sensitive or have finer gill filaments.
