Very cool. I want to do something similar in a few years.
My plan was to use 2 return pumps. One for circulation and one for flow. Not sure how feasible that is. May take 2 extra.
Everything being hidden in the rocks is so cool looking and exactly what I’m chasing once it’s time to go.
The carpet anemones are so nice to look at but so aggravating to put in. Mine gave me a bunch of nice little welts.
I am testing this setup in the way I currently have it. I want to do this in a larger format, but I did not dare to go on that adventure without some experience.
No powerheads means you need to have some other good flow.
When having Anemones, you don't want them to get into anything.
In the future bigger tank I would indeed get some closed loop. But the inlet would always be behind a overflow for anemone security.