I have cut pieces off of my sponges when I first got them. to stop the death from spreading, It does work, be sure to get all of it. Dont worry about having small sponges for a bit they will grow.
I feed my tank phyto and reefroids and haven't had any problems with my sponges...yet.
My orange branching one seems to be growing quite well.
Good luck
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to many tanks, enough time for half
Yo Mama's so ugly, she scares people with the lights OFF
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