Thanks for your reply :)
I wouldn't really be using the tank lights much anyway to be honest. Didn't notice it showed which filter there is in the picture for the tank. Are there any other filters I could use that wouldn't heat the tank up too much? I can use eBay to get another filter.
Luckily, I'll be starting this tank up in Winter so won't have to worry too much about the tank heating up during the day. So at least I can get used to the normal maintenance and start on the cooling when I'm more used to the axolotl itself.
Also, if the only place I can put the tank isn't able to fit/hold a 98L, would either of these two also be okay for one axolotl? AquaEl Classic 50 | Aquarium Supplies AquaEl Classic 60 | Aquarium Supplies
For the AquaEI 60 I could probably afford a proper aquarium cabinet for that so will be easier to place the tank somewhere.