GPH in my tank

[PufferMan]

So I recently got my 20L reef tank setup and running. I have to small penguin hob filters on it. I also added a seio p320 circulation pump. There's definitely more flow in the tank now, but I'm not sure it's enough. Is 320gph plus the hob filters enough circulation for a reef tank? Should I add another circulation pump?

 

[Cubbies]

I personally think you'll be fine. That would've been more than enough for me. I used to run one koralia nano on a 30 long along with a HOB skimmer and a HOB filter. To me sometimes it felt like too much. I think it also has to do with preference and what corals you are keeping. Some corals don't like as much flow and you will never see their beauty with too much flow and some thrive in it.