hole in flesh

Flesh exposed on elegant coral, noticed it’s been bitten off. The damaged side mouth is still attached but its skeleton and flesh is 20% exposed underneath. The coral has 3 mouths in total so will it heal itself or is it the start of more deterioration???? how long will it take for the coral to...

Just realized today that my wellso has a tear in the tissue. What should I do?

Good afternoon, Quick synopsis…mature reef, 65 gal 1.025 Nitrate 5 Phos .8 Alk 9.5 Cal 500 Mg 1470 pH 8.1-8.3 Tank been running for 6 years Running Modified Moonshiners 1000ml kalk I’ve had the yellow tang for well over a year. Quite healthy or so I thought. Wife noticed ‘white dust’ on him...