I pretty much solved my heat problems for now by switching to Sodium Hydroxide in pure water. After a few experiments I found that I could replace my 2 teaspoons of Baking powder with a tiny pinch of Hydroxide and get the same results but much cooler. I had a thermostatically controlled pump connected to a copper pipe coil and also an adjustable speed fan! Now I have only the fan running and it stays comfortably at around 60 to 70 degrees C. Oh I forgot, this is on a 7 plate cell +NN-NN+. I have done 600kms on the same water so far, with a top up of plain pure water now and again. The water seems to condition itself after about 100Kms.. Best of luck all!