I live in Florida and have a groundwater pond that is approx 30 ft by 80 ft and 4-5 ft deep. We dug this about 5-6 yrs ago. Cattails and other weeds are slowly taking this over. Last year I tried killing the cattails but that just made the algea worse. We currently have the property for sale and this is getting to be a maintenance nightmare. No problems with water management district in filling in as it was not natural to begin with. Some of the dirt that came out is still in mounds but I am going to have a lot trucked in. One estimate was 3000 dollars to truck in dirt and fill in.

Any ideas?