Hey Greg, Joe here...your ol pal down in Taylor county...there are three aerators in the pond. Bubbles are pumped up from the bottom 24/7 in 3 locations and there are 3 fountains that are set on timers. The lake was built in the 60's and had a major fish kill around 2000 which led to the installation of aerators (from what Ive learned). The water is still very very clear but does stay stirred up from the aeration. Being a life long fisherman, I have seen parasites in fish tons and tons of times. However, I have never seen bass with hunge heads and thin as a piece of paper(they literally have spines showing in front of the dorsal fin where as the healthy fish have meat). I will get a pic of these fish but they are clearly very sick. I removed about 25 of the "sick" looking ones with the fly rod last night. As far as the birds go, they are safe..lol..we love watching them and are one of the reasons we moved here. The ducks in the marsh are in for it though! Thanks for the help folks!