At this point, I wouldn't worry about the flow in the display tank beyond your circulation. When you make a decision to get corals
then cross that bridge. Don't spend more money than you have to at any given point unless you are certain of what type of reef system you plan on keeping. Lord knows this hobby is not cheap.
To help with abbreviations, please see this. It will help to better understand the language of the marine aquarist. I find it helpful all the time.
https://www.reef2reef.com/ams/acron...-the-reef-aquarist-revised-december-2018.550/