UPDATE.
Anemone bit the dust yesterday
RIP --- Had to take its goo out before it affected other inhabitants in the tank and did a minor cleanup.
I was able to control the temp by dropping a frozen 2L bottle of water into the tank, and all inhabitants (2 fish, inverts, and corals) seemed to appreciate the cooler temps.
Thanks anyway for your help/advice.
I will now start the hunt for a new home (anemone) for my 2 clowns.