Before the hurricane started we shut off the pump and covered the pool equipment (afraid of trees falling on the equipment). The day after the hurricane we went to restart it and it needed to re-prime (it was off for about 36 hours). The pump and the filter had no water in them. We didn't think too much about it but now every morning when it turns back on it needs to re-prime. This never happened before. It was always primed when the timer would start it running. Any ideas?