How to decide flow rate and direction

[WhoKnew]

I am having troubles deciding to pure flow inside my DT. My softies look great without it, but other corals are shrinking. I have a 55g bow front. What do I use and how do I direct it.

 

[Reefing Madness]

 

[WhoKnew]

So, I took the powerhead out of my tank, and put a circulator instead. Corals are happier, I am happier, and the water is still moving.

 

[trido]

Personally, I would put a Jebao WP-25 in there on wave mode and that would probably be enough for softies and most LPS
For SPS, Id use a pair of them.