Jlynch, Sonar also comes in a Sonar RTU version which is much cheaper. I went to the dark side, and actually bought some to treat my 1/4 acre hatchery pond. It took about 5-6 weeks to clean up the pond, but it was well worth the couple of hundred it cost for 2 bottles. Ron Popeil should be selling Sonar on cable TV. You just set it, or in this case pour it in, and forget it. Spraying my smaller pond with diquat, glyphosates, and algaecides, with active CNBG and tilapia beds rolling along all summer, was not something I wanted to do.
