Frogspawn coral care and advice

[oceana4]

I got home from an evening out and found my Frogspawn in trouble - half of it was detached from the skeleton, barely hanging on with a thin thread of tissue. It's in a moderate flow area and I've had the frag for about 3 months now. I've ruled out a fish attack since there were no bite marks. I'm thinking it might be a nutrition issue, but I'm not experienced enough to know for sure. Any help would be great - I'd love to prevent it from happening again.

My tank's parameters are:
S.g 1.024
pH 8.2
Ammonia 0
Nitrite 0
Nitrate 0
Phosphates undetectable

I did a 30% water change right away with Red Sea Salt.

My tank's got:
Blue Spot Goby
Magnificent Foxface
Melanurus Wrasse
Christmas Wrasse
2x Cleaner shrimp

It's a 75 Gallon Tank.

[dusked6]

To better understand what's going on with your Frogspawn, could you please share your Mg, dKH, and CA levels? I also noticed your specific gravity is slightly low - 1.026 is generally considered more suitable for LPS corals. Additionally, what's your tank temperature and what type of lighting are you using?

[deepfin]

I agree, it's a classic case of polyp bailout. Too much flow or a lack of essential nutrients like cal, mg, or alk can cause it, and pH imbalance is another possibility. What dusked6 said about your SG being low also rings true, 1.026 is a better target for LPS.