Bleaching rocks to kill flatworms

Yup, those are the ones. I have seen two fish stores completely taken over by them one in California and one in Tucson.

You will have to recycle the rock work regardless, me I would just put the rock outside in the air, let it dry and recycle in another container. I would still be concerned about residual toxins though.

In a 29 gallon tank it might be worth replacing all the rock, placing all corals in a QT. Flatworms hide and reside everywhere, in the sand, filters you name it.

Sorry and hang in there.