I also wanted to take the opportunity to add a couple of photos of the back of the tank.
This shows the three compartments, left is the drip tray and media, middle is where we put the heater, right is the pump. We ditched the bioballs and added in some live rock fragments in the left chamber, currently sitting between the sponge and the carbon, with wool on top.
One concern I have is the heater placement and utility. It is set to 27C, but the thermometer we just put on the tank (the stick on outside strip kind) shows just 21C. Is the warm water from teh chamber not flowing through the tank sufficiently? Or do we just work out what the thermometer temp should be so the outer tank is at 27/28C? Ie it might need to be set to 34C.
(#41####, seems I lost the ability to edit the post above! Oh well, here's what I was going to add)
The guy at the LFS advised us to buy some carbon and wool, said that the rock might cause a bit of a stink as it goes through the cycle! To change the wool every day almost, and the carbon media weekly, to keep the smell down. He also advised to ditch the bioballs before we get to the nitrate stage and replace with LR, so we decided to do that now while we have spare rubble.
Cheers