Have a small 60' x 70' pond with minnows, mosquito fish, and crawdads. This is what the water has looked like the last 3 weeks (split pea soup) - even with adding some clean river water every few days. I have two larger ponds - 1/2 ac and 2/3 ac and never see anything like this in them. Is this a matter of too many fish (50 or so minnows, 500 mosquito fish, and unknown number of crawdads) for such a small pond ....................or ??