130l Freshwater tank & DIY sump setup

New 130l tank & sump, DIY sump design from uarujoey with a second overflow for a backup, 2 x Jebo 100W heaters, Via Aqua 480 200gph pump, 3 level tray for wet/dry filtering from the top superfine and larger spounge, middle and bottom levels are Eheim Substrat pro, and 300 bioballs in bag just under the wet/dry filter. Main tank is 1200x425x285 and sump is 610x305x305 with a total of 130l between the two. This is going to be a breeding tank for discus fish. As you can see there is no life in the tank just yet as the first day of running was 31/12/2011, this is because I have never had a sump tank bio filter before so I am taking this one set at a time with leaving the water toxins to level out should show me what is needs to be changed or made better in the tank before introducing life. Suggestions or comments would be greatly appreciated