I have the UNS 90L, which is 36”x12”x12”. Flow was pretty tricky to work out, especially with just one pump. I started out with a single MP10 on one end, and as you might imagine, flow was strong on the end with the wave maker, and pretty weak at the far end. For me, even the lowest setting seemed a bit strong near the wavemaker and being on the lowest setting didn’t give much variation during its pulsing cycles. With more coral in the tank to restrict flow, this may be less of a problem.
I didn’t really want to get a second MP10 for the opposite end since they are so pricey, but I ended up doing it after struggling with the flow for a while and wished I’d gotten it sooner. To help get the overall flow rate down, I designed and 3D printed a new nozzle that would be more restrictive, and that has worked nicely. With the 2 pumps at opposite ends and the lower overall GPH, I can turn the percentage up to get more variation without it being too strong.