It is too bad JM does not have water clarity readings for the pond before and when the koi and Israeli were at the point of controlling the FA. My experience is the algae gets controlled due to reduced turbid water clarity (suspended sediment) rather than these fish actually eating the bulk of the filamentous algae. Sediment laden turbid water causes reduces growth of bottom originated filamentous algae and attached periphyton with is food and often shelter for many small fish (fry).
Scientific research has shown many times that turbidity due to suspended sediments and not plankton actually reduces the food productivity of the ecosystem by reducing light penetration with non-edible food particles. These non-edible sediment particles in the water column also do not produce dissolved oxygen which is not beneficial to the pond ecology.
Last edited by Bill Cody; 06/26/16 09:17 AM.
