Just registered as new member. Very interested in your website. We live in Firth, Idaho and purchased a place with an existing pond about 7 yrs ago. The pond is about 1.25 acres and average depth is about 6-8 ft with several deep areas of over 12 ft. It is fed by a spring that is about 58 degrees and flows all year. The flow we think is about 50-80 gallons/minute. We have trout and grass carp. Our problem is the algae (scum) that starts to form when the weather warms up and it has been our biggest problem. I have a windmill aerator that I put up about 3 yrs ago but am now installing an pump aerator. Went to PB to find solutions or suggestions. Thanks for a very informative forum.