Hey Jan.The flow in the tank looks very well.
8 pumps is a lot.
The WWC shallow reef has only 3 pumps (pretty big pumps).
The price of pumps is of course also a reason to look for more, rather than to get big.
The corals and colours look stunning.
I am now using "only" 6, due to the problems with 2 of them.
The good thing about using so many pumps is the possibillity of fine tune each one, and get a proper circulation in each section of the tank.
Thanks!Everything is looking really nice Alex!