Blood shot closed up suddenly

[kris2001]

This blood shot zoa closed up for a week.... Isn't opening up... What to do?

Parameters, lights, flow etc didn't change.... Other zoas are all doing fine.

Middle left in pic... Thx

 

[Reefing Madness]

 

[The_Paradox]

Baring other animals only time my zoas have closed up is if I have dinos starting to form on them. For me they are my canary that I need to increase dosing.

 

[kris2001]

Moved to more flow and increases alk... Now it's ok! Pls close