Thanks Guys.
I have the water test kits, but i was just concerned about the actual temp of the new water, i havent any fish just yet but i want to be prepared once get them and have to do my 1st water change.
Years ago (about 25) i had a goldfish, i won it at the fairground, my mum cleaned it out one day and nearly boiled it alive, she thought the cold water was too cold and added some hot water, but it was too hot and the poor thing was jumping out the tank, it did survive and lived until it was 17, but she never added hot water to it again...
i just wanted to make sure i didnt add too hot or too cold water and stress my fish.