Sorry if this has been posted before, I did some searching and couldn't find anything.
I am looking at making my own MLT. I have read a good portion of FlyGuy's threat about making one out of a cooler. Is there a major difference between a round or rectangular cooler for making an MLT? I have been looking and the rectangular ones are cheaper but I want what is the best one. If it makes a difference , I make 5 gallon batches.
Thanks in advance,