Plus if the pond/lake became clear the fish would become available to bird predators - seagulls - Herons - plus on land cats - known them to drag fish out of a pond with no net on -The only problem with the cloverleaf Joey, is that by my calculations, I`d need to buy 11 x 10kg tubs of the it, to properly treat the pond, which would cost me over a grand !
The only other realistic answer, would be to buy some young Grass Carp and let them munch their way through it - would be much cheaper.
The carp you need are these -
Triploid Grass Carp are one of the most effective pond algae eaters. Though they primarily feed on aquatic vegetation, they also munch on filamentous algae and submerged weeds - shop around on the net & buy 100s of young ones - they are bottom feeders too
