Thanks for that guys!

I got a new thermometer today and it reads 32!!!! Yay

As for my filter, i have bio media stuff in some of the compartments too, a finishing sponge and sponges to collect the large stuff at the first stage. Its a fluval 305 i am running.

The external is a new one which was why i made the decision to turn it off - that and because its fiddly to open and close and i could not be bothered to take the carbon out it, how lazy!!!

But now it needs a clean anyway so i should have just done it!!!

Thanks for the advice guys, i now have two heaters running instead of three to see what temp i am left with!