Plumbing Advice/Assistance

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Hey there, I recently bought a 120 gal tank, with a closed loop system. We are going to leave it as a "room divider", lengthwise from the wall. The rear with the plumbing will be exposed. I would like some advice or even assistance in re-plumbing so that the plumbing is less obtrusive. most of the plumbing is done with spaflex, which I don't mind replacing, if I can find more, easily. The bulkhead on the right (in the picture) I plan on cutting (and plugging) to use as an emergency drain, yes herbie with a ball valve. The closed loop system is run by a reeflo dart, should I just run 1 down & cut the 2 returns and use just one on one end ? I am also planning on using a WP40, on the opposite side ?