Swimming pool ruined?

I emptied my pool out back in November. Last week I started to drain all the rain water that was collected in the pool and acid washed the entire pool. Then I filled it back up with water and it looked picture perfect. Then when I turn on the pump, dirty looking, almost coca cola colored water start pouring out of the waterfall. The entire pool is hazed with this now. Will I have to drain and refill? Or will shock treatment clear it up and make it safe again?