Any recommendations for a good, affordable submersion wort chiller?
50' coil of either 1/2 or 3/4 ID copper tubing
2 compression fittings with appropriate attachments for your water source.
If you can get the precoiled copper that's really all there is to it. at some point I wrapped some copper wire to hold the whole thing together so it didn't spread out so much when I picked it up but other than that I have used mine for a couple years now. 11 gallons boiling to ~80 in summer in < 30 minutes
Do you think a 1/2 or 3/8 tubbing is better? 3/8 is always more expensive and was unsure why.