Basslover, with your water clarity and lack of phytoplankton for gizzards to live on, I think you will be safe from an explosion of oily, nasty fish...lol
I doubt Threadfin would survive there either, unless getting LOTS of Ag Lime in the watershed and starting a bloom. Given the size and health of your fish, the almost perfect plant life and distribution that provides areas for the base of the food chain to grow in, I don't think I'd want a bloom starting in your pond, unless it was a very slight bloom.
