If I may, an observation.
Is there any way the frag tank can move a few (five) feet to the left?
Given that you will be using it as a frag tank, and QT, you really don't want your qt close to your sump for the main system. Splashing fish, bubblers, water changes all spill water. .
All you need is a drop of water cross-contaminating between Your systems and your display tank now has whatever is in your quarantine tank.
Moving them apart will also make you less inclined to share tools, which you should not do. Everything for the QT/Frag should be clearly marked and kept and used only in and on that system. Nets, hoses, siphons all separate to best set yourself up for success.