Thanks everyone. More pics to follow as i go along.
Not sure Leigh, i initially thought that perhaps with the equipment heat and room temp one wouldn't be needed, but i needed one to get it from really cold to 78 during setup, which took 14 hours to warm up. I have been checking and the heater does switch itself on periodically so obviously one is needed. The LFS, who are setting theirs up at the same time, also made the same comments. The LFS put one in theirs and also gave me a free one to get my system up and running. The heater is suctioned down in the bottom of the left hand sump compartment, skimmer sits in the middle with carbon and media, and return pump in the right.
Perhaps one will be included in the future shipments in Jan.