Sinclair doesn't seem to have them.
I had been using a small battery operated aquarium aerator to cool by barrels. They definitely helped but didn't put out much volume. I got my new Barrel Cool last week and all I can say is Wow! That really moves some air by comparison. Can't wait to use it. I am sure it will work much better.
Thx for that info! I've been using a battery op fish tank pump for several years and thought it has served me well up here in the High Desert of CA. But if the Barrel Cool pumps more air through, I'm getting me one.
Alex