dedfish that plumbing in your pic is not equivalent to Tunze because is not fully controllable. You'll need to add a lot of valves there to match this sweet Tunze controller:
Here's another thread to confuse you more. This guy is thinking the same. FWIW, I have a tunze 6060 in my 90 and it's great. I think the OMs are great and would consider it if I weren't so plumbing deficient and lazy. I just plugged the tunze in and off it goes. Thinking of adding another since my tank is 90% sps.