With a 25' by (x) IC, is it better to runn water through it at slow speed (more contact time) or at a faster pace to get warming water out of system faster? I have tried it both ways, and in the warm summer with warmer ground water, it took quite a while at fast speeds. My second to last batch I used a dramatically slower speed to reduce water usage and temp dropped quickly with cold ground water. My next batch done yesterday, about same temp ground water, took almost 40 minutes compared to 20 the last time I tried this slower speed. i do not as of yet recirculate, but do stir the pot. It seem so me that both slow and fast have worked under different circumstances, just wondering in general which is the better method? Any input would be greatly appreciated.