Thanks Cecil
I live in Northern virginia so the pond does freeze over on occasion but certainly not all Winter. I would guess the pond is about 2.7 acres and rectangular in shape built between 50=65 years ago. It is pretty shallow 2-8 ft with 1/2 the pond at less than 5 ft. There is alot of muck in the pond.... I sink about 2 feet into sludge in the shallow end if I try to wade across. Is it worth having a diffuser that runs into the shallow end as well?