Brown Fish Pond

Whoop! What happens to the pond water ? Can the fish survive like this? Most of the fish reared locally are Tilapia and Carps. I can see the workers using chicken wastes or some chemicals to feed the fish daily. The smell can be unbearable to even in my farm. I do not know how these people can stand.
I never like to eat reared fish, stagnant water, unknown food being given and taste of earth are the excuses. I prefer deep sea fish, but are expensive. When you are poor, you have not much choice.