70???????????????????????????????????????

does anything even survive that cold tempreture, let a lone the big swing????

Anybody, is this normal, or even doable?

Sorry about that I had meant to put 73. Though I think stuff can survive in 70

That is still quite a big swing!!! Do you keep a reef or fish-only tank?

It is a reef tank. I agree that it is a big swing but it was that way for the entire summer and everything was fine. Now that I have my heaters plugged in it shouldnt be as bad.