Is this the appropriate flow for a nem

[LeanneP]

I have had this nem for about 7 weeks now and it is still not totally happy. I have concluded that it must be the flow and lights that are still an issue as all my parameters are good. I have had this flow on it for about a week and a couple of days ago it was looking better, closed yesterday and is starting to open today again. I have not fed it for a week now.
Just wanted to know if this is the right amount of flow for it or too much for it.
Leanne