the easiest way is to get new developer times at room temperature, whatever that is for you. I lived in Houston and in the summer, water temperature was 78 F. I never saw it go lower than 70 with exception of a few days in winter. I standarized to 75 and when I needed a little bit cooler I just added one piece of ice.... much better than buying a tempering unit, or doing the temp averaging you are doing.(posted 8253 days ago)