A buddy of mine has a pond that he built 8-10 years back. Its about 60acres with average depth of about 6 feet, but also has about a 2-3acre 20 foot deep hole in it. That yellow slime moss has absolutely taken it over! A man cant even put a hook in the water of any kind and keep free from it. There are some nice fish in it, but havent been fishable in the last 2 years. Any suggestions of what needs to be done to rid this problem?