I doubt that big white patch will come right,They are in my rescue tank now just want to see if they come right! That is where the picture was taken.
I doubt that big white patch will come right,
It probably smells awful right?
If you have Iodine, give it a dip in Iodine.
You can even give it a rinse in RO water for a short time.(Some down recommend it)
But I have done it previously, Rub off the white parts and leave the other polyps.
Also, Make sure all the polyps are closed before rinsing them.
Hopefully they might get better.
Where did you get them from?
Is your salinity reading/testing 100% correct?