Someone will eventually bring up Israeli carp sold by Zetts in Pensylvania for filamentous algae control. These fish are a variey of common carp often called mirror carp. They are fertile and can reproduce like wild carp. They feed just like 'wild carp' by rooting in the sediments for food. They are omnivours which means they eat a variety of living and dead plants & animals found in the sediments. Their digging or roto-tilling and roiling of the sediments is the main feature primarily responsible for any algae control achieved. Only about 10%-20% of their diet is plant materials. Roiled, muddy water shades and supresses weed and algae growth. Digging activites sometimes digs up shallow rooted plants. Myself I prefer pond water without suspended mud. The fish will also eat fish eggs laid by broad cast spawning fish. Debate is out there if they eat eggs from nest spawners.


aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management