Green slimmer die off!! :(

[abeandlulu]

I have a green slimmer blue tort, and a bicolor acro that all have die off at the base. Everything else is fine and growing like carzy. The coral in question are also grownig. My water is fine.
8.3 ph
0 phos
0 nitrates
475 calc
1400 mag
9 alk
My lights are 6 months old 3x250 MH 265 gallon 75 gal refug. The only thing is I have a flame angle but the corals have die back at the base and no where else. im posting a pic of the green slimmer. I just moved him so color is a little off. Any in put will help. thanks

 

[ibew41]

how long have you had the slimmer and have you added any other corals lately

 

[bang guy]

A Green Slimer is typically a pretty tough coral. I wonder if it has grown to the point where it's interferring with the waterflow. Is that possible?

 

[abeandlulu]

I've had the slimmer over 3 years, and I have not added any new coral. I did adjust the flow yeaterday and angeled it up more thinking that it is not getting light in those places. but I also have a blue tort, and a bicolor acro doing the samething.

I have 2 6105 tunzes and 1 6055 tunze. Do you think i need more flow??