How much flow for 90g?

I am currently running 68x flow (3100gph) in my 45g tank. It keeps detritus off the floor and gets in the filter sock/sump for easier removal. My intentions were to simply double this for my new 90g- Same foot print just taller.



What are thoughts regarding flow in a minimally scaped 90g BB? I plan to try my hand at mostly LPS and SPS with this tank but maybe a few softies.