I want to show you guys how I keep my beer fermenting at the temperture that I want it to be, using equipment that I had lying around.
I made this nice heating setup using a garden hose attached to a cheap fountain pump in a bucket filled with water.
I use a ”Submersible Aquarium Heater” to keep it at the precise temperature.
The warm water is pumped around the fermenter through the garden hose and keeps the temperature at (in this case) precise 25 Degrees.