African Clawed Frogs are subtropical but might slow down if the water drops below 70.
African Dwarf Frogs, on the other hand, need warmer temperatures. Mid to high 70's is necessary and I wouldn't go any lower than 75, personally.
Basically, they both need similar temperatures but the ACFs tolerate cold water better than ADFs (though neither species is going to enjoy temperatures in the 60's and it can slow them down).
I just went to double check the water and it's 73.6...that should be right on target right?