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Sponge Question

I have some sponge that is growing between some zoas on a rock. How can I kill the spong but keep the zoas alive. I don't want the sponge to over run the zoa rock.
 
I've heard that method but I've taken my sponge rocks out for longer periods than that and they still don't die. ... ?!?!
 
ball sponges die very quickly via the exposure to air method. You sure it's a sponge? Maybe a pic? Couldn't you physically use some tweezers or something?
 
It's not ball sponge. It's a type of encrusting sponge. Looks like this but it's beige or white.

Yellow-encrusting-sponge.jpg
 
I had this happen to one of my zo rocks. I lifted it out and used tweezers to pick the sponge out from in-between the polyps. Tedious but effective. The polyps are strongly attached compared to the sponge. I was left with long stalked polyps in the end. ;-)
Do be careful of platy toxins (sp?) zo’s are very dangerous when handled out of the system. Be sure not to get any zo juice into cuts, eyes, or mouth!
HIH
~S
 
Thanks Shark, I'm going to try the tweezers deal. I've been fraging a couple zoas for this week and so far so good. That's one of the things I'm extremely careful with. I wouldn't want to miss work cause I was playing with my fish tank.
 
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