Help with this coral

[byrdman81]

What exactly would cause sps to loose tissue in the middle of the coral. I don't see any red bugs. In this pic you can see tissue lose in the middle of the coral. I clipped off a
Section in the lower corner that had algae growing on it because it was dead all other coral seem to be fine and not affected by this.

Alk is 9.5 ca is 440 mg is 1500 sg is 1.026 I bumped up nightly dose of two part and alk went up 1 dkh in 8 days. I dose 3ml of mb7 once a week and .2 ml daily of vodka.

 

[byrdman81]

Well problem is/was red bugs I bet. Found some on other acros. Treating with interceptor as we speak.

 

[Whisperer]

Red bugs affect polyp extension but do not result in loss of tissue. You might want to check for AEFW.

 

[byrdman81]

Well either way I spotted redbugs on other acros so treating with interceptor. Coral is almost gone today definitely rtn. Who knows the cause.