yucky green stringy moss

how do i get rid of this stuff in my pond....

Multi-tiered pond, large
one large rock mountain in middle, feeding two seperate ponds - higher up -
on east and west - these feed large "lake" pond in front - water flows into
large skimmer intake, thru filters, pumps back up to rock mountain water
fall..... system is homemade, no pond liner, all concrete and rock

water lillies are in pots.... and could i have "over fertilized' the lillies
with the chicken poop i used?

Lower pond has koi
upper east pond has oscars / severums
upper west pond has ciclids

will additional pumps / lines in ponds to increase water movement help with
the moss \ algae

thanx

SNC