I am new to this forum stuff. I too have a pond about 1 acre with lots of murkiness. I live in Central IN and have mostly clay. I have read some of the ideas and wondered about the straw idea? I have some loose straw but I think it is wheat straw. I assume it just helps on the settling factor around pond edges. I aSomewone said Barley straw helps?? If anyone has tried this let me know. I also have a vast majority of my population is catfish - which probaably also contributes.