Posted: Sun Aug 30, 2009 2:05 am
Ice cubes would be alright, but depending on the size of your tank, they may not do much.
Frozen pop bottles also work. In the summer, when my tanks get too big, I freeze a 2L milk jug and they'll cool the water in my 75 and 90 gal tanks by about 1 degree.
Ralpheal, "The 'L' is silent."
Frankie, "Young at heart."