Help with nems and lighting. What am I missing?

[Kayanarka]

Thank you all for your suggestions and help. Given it all, here is what I made a change to. Thoughts? Thanks again guys.

I am following, just added bta and lta to my tank.

 

[Tonyreeffish]

My first thought was chemical warfare. Two different species in close proximity can definitely kill each other. Let us know if the change in light schedule made a difference.