The first batching used only tap water running it through the chiller. Second time I used tap water for a while, then switched to recirculating ice water from a six gallon bucket, draining water and adding ice as needed.
Sorry missed your comment yesterday and realize this point has already been make by now. Recirculating hot water back into the bucket will melt the ice faster. Discharge it and replace the ice bucket water with fresh cool water. Sounds like that's your next plan. Good luck!