I We live in the age of energy; and so , I have a number of waysof keeping developers warm even though it is freezing outside. I bought a "crockpot' for $2.00 from a junkstore. I have a Hot Pot ( and I have boiling water in 2 or 3 miutes), then there are the "Bun Warmers", almost give away items at junkstores here ,..some are very large and heat my 8 x 10 developing tanks to just the right temperature by morning. Best of all, the seed warming matts sold by "Johnnie's Seeds" which heat to about 80 degrees over time; absolutely great for a long line of next-to-use-water-and chemicals and so forth as it is a long mat and heats them all while you sleep. We are living in in a new world, and if you can't get chemicals to the right temperature... look around you. Jean
