I have been brewing 5 gallon batches and am thinking about moving up to a 10 gallon batch this weekend. All of my equipment is capable of mashing and brewing this volume but I am not sure about my immersion chiller. I am using a homemade 25' 3/8" immersion chiller in line with a 20' 1/4" copper chiller which will be submerged in ice water to keep the temperature low. It has taken about 20 minutes in the past to get down to 75-80 degrees for 5 gallons in my keggle, so i'm guessing it will probably be about 45 minutes to get 10 gallons down to this temperature with my current chiller. Should I consider making a 50' 3/8" chiller for these larger batches? I could go the counter flow chiller route but don't have a pump to circulate and i'd rather put off any major purchases until I have time to upgrade my whole setup. Any input is appreciated!