dwarf - the danios are a moving in present lol no only kidding they go back to the shop.
Paul - The sump has plenty of space for media, that trickle tower holds a 50kg bag of alfagrog alone. the sump as I said is actually a 4 foot tank so will be adding more media later but I needed it setup quickly so I could start the cycling process, eventually I will add slots for more sponges, and carbon but thats in a few weeks.
I wanted a wider tank but decided to go long but have already started negotiations with lfs for a 7 x 3 x 3 tank.
The AC5000's do 3800lph each so thats a turn over of the tank of approx 7 times at least plus I have two redundant external 404 's one of which may just be connected to the sump for even more cleaning.