From the way the talk was going last night, they were very postitve it would go ahead, but couched it in terms that sounded as if there might still be a chance to change the course. However, I am guessing it is a foregone conclusion.

Carp do not eat algae as a major part of their diet, and certainly not the water suspended algaes and diatoms that turn the water green.

The solution would be to plant more high order plants, get reed beds and willow stands in place along the margins, vallisneria and elodea are useful to reduce the nutrient load in the substrate and to bind the substrate through rooting, and can be harvested to remove nutrient from the system. A variety of floating plants are also good nutrient control, and again can be harvested to remove nutrients and reduce the nutrient load in the pond.

Carp prevent the growth of these high order plants by actively rooting them up, eating them and covering them with the silt stirred up. There is little benefit on this front of having carp in the pondages. Catfish would do the same job and be a preferable fish.