How do you know when you are starving SPS?

[wrimda]

Just as the titles states!
How do you know when you are starving SPS?

Thank You
wrimda

 

[MarcWeaver]

Colors will start fading, STN will start happening, and polyp extension will be reduced. That's what happened when I overdid carbon dosing and drove the nutrients too low. I backed off on dosing and started adding amino acids and everything recovered over the course of a few weeks.

 

[AquaReeferMan]

Very light coloration is usually my indicator.

I too hit the bio pellets a little hard and noticed a pastel look on most of my SPS. After removing the pellets and switching back to GFO along with feeding a little more they regained their deep coloration.