Originally Posted by AnOldUR
Not a great picture, but hidden under there are two carboys during active fermentation in a water bath. The thermometer on the right is measuring bath temperature. The thermometer on the left is a long stem compost type thermometer with the probe in the center of the fermenting wort. For all practical purposes the reading is the same.
I have gone for a waterbath setup for actual control. I have a larder which is about 10-16C during the autumn/winter, the idea on my next batch is the put the fermenter in the water bath with an aquarium heater and stick the whole lot in the larder.
For the water bath I just bought a 72L rubble bucket.