I have built an 8000 gal pond using EPDM liner. Water is pumped through a bog and runs back by water fall. Have around 40 1 1/2" gold fish fed once daily only what they can eat. In pond I've placed one potted Lilly pad. Not yet grown to water level. Bog has several native plants that came from surrounding areas. Is it normal for water to start turning a shade of green to get proper cycle of nature going. By the way my pump is 5700 per hr