I like the idea of a closed loop system, are you going to share your next tank ideas?
If I was to go with the 1700 long x 750 wide and 580 deep tank what would the recommended lighting be? My current light setup is 1000mm x 450mm wide which would mean 350 at each end of no light. Maybe the 1400mm long tank would be a better option. I have also a T5 setup which looks the same they could go side by side, but I don't like the clutter and is a pain for cleaning.
Could my 2 x 150's MH be enough? or completly out of the question?