I have a tall tree sponge and some of it's tips started to loose some flesh, exposing the sponge beneath. Is the whole sponge a goner? Or do I trim off the dying parts? Or do nothing and see if it continues?
You could try cutting the dead tips off.I dont know that it would help,but its worth a shot any how.
Tree sponges are just tough animals to keep,especially in a reef.They dont like light.
Good luck with it bro...my old one started out just like yours, but it ended up dying...try placing it in a shaded part in your tank and see how it does. Good luck.