It is inside the skimmer where temperatures of air and tank's water is exchanged almost 100%.
I made 2 air tubes, the first one is from inside my ballast (for winter) and the other is through fridge door's sealer (for Summer). Both of them are leading to my skimmer.
I connect my skimmer air intake tube to the second one on Wed. early morning and my tank is among 79-80 k.
This is my general idea. To achieve the way you want, you have to figure out in detail such as time to connect and disconnect, air pump, timer...
hopefully it helps
Don
|