I was thinking about running my hot wort through a March pump and then an immersion chiller that's in a bucket of ice (maybe 2 chillers/buckets of ice), then into my fermenter. I figure I can control the output temp by putting a valve on the outlet of the March pump and adjusting flow. I have not heard of anyone doing this, maybe out of difficulty cleaning/sanitizing the lines. I'm sure someone has tried this, I'd appreciate your feedback or experience.