I've seen all those numbers. They're based on studies with actual instruments measuring dissolve oxygen. But in my experience, almost any effort does fine.
Air pumps are noisy. Heavy air pumps are very noisy. Running six big ones in my small greenhouse was making me crazy. It wasn't enjoyable. That's when I switched everything over to venturi.
Venturi aeration is initially more expensive, because you buy a water pump and venturi for each reservoir you want to aerate. And they are virtually silent. Indoors, you can hear some bubbling and faint motor noise, but that's all. In the greenhouse, I have to look to see if they're still running. It's nice in there now.
I used by standard pumps
https://www.amazon.com/gp/product/B07L54HB83
https://www.amazon.com/gp/product/B082M7FNK6
And 1/2" venturis from Amazon. It's easier if you have pumps with 1/2" NPT female outlets.
https://www.amazon.com/gp/product/B07DPQZNCB
Here's one running in a test.
I did some testing cutting away half the venturi, and found I could fit the combination in a 5-gallon bucket.
https://redwing-farm.blogspot.com/2021/12/an-off-shelf-small-volume-venturi.html