My wife was watching me change out about 5 gallons of water in my 20L last night and noticed a cord running to one of the plastic jugs I keep RO water in. She was curious and when I told her I was heating up the water to the same temp as the tank water she thought I had lost my mind. I run an inline on most of my tanks and I have a regular tank heater to heat up water for water changes. Anyone else do this or am I just incredibly anal like my wife claims. 
