Can I frag photosynthetic sponge in tank?
 

Hi,

My sponge is attached to a large feature rock that I would really rather not take out, but I'd like to frag it. Can I cut it in tank or will it poison the water? Not finding a clear answer online.

Meghan

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Yellows are particularly bad about releasing toxins, but they're not the only ones. I would take it out to the qt tank and let it recover, and don't cut it in the tank.

Thanks, mine is a purple photosynthetic plating sponge


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Many sponges (I can’t see yours) constantly move waters through their systems, and any disruption (pulling from water) may result in the whole thing dying.