LOL...I think you are a victim of Black Friday...Very few people are around, they are all out shopping. I have had one of the nastiest colds I have had in years, so I haven't been around either, Christian Holidays don't affect my being on the site.
For my 90g when it was set up as a reef, I had 3 Koralia power heads #4s, I have no idea what the actual flow of them were. I recommend one power head to churn the surface area, for good gas exchange....and then two in the back pointed toward the front, to bounce off the front of the glass and keep the rocks clear of debris. Technical I am not, but that was my method, and it worked great for 14 years.