I don't think it's really necessary, as long as your house (and your tank)
is heated at all, although I haven't actually measured the difference in
bubble rate. I keep a bottle on top of each planted tank - which are
themselves at 74º - next to the lights which gives the added advantage of
slowing production down at night when the lights are out and the house is
cooled off. In my 75 gallon, I also keep two bottles under the tank in the
enclosed stand with the electrical equipment which is typically warmer than
the surrounding area.

kush

"You can't have everything - where would you put it?"

Jill Walker wrote in message
...
I have read about using a bucket and a heater to kept your co2 warm in a
cool house. Does anyone have any other experiences or any other solutions
for this problem?