When I sold off my 300 gallon tank pending a move to a new house I had this same experience. My son and I helped the purchaser and his friend get all the rock into bins. Just the action of moving the several year old and paly covered rocks was enough to cause the toxin to release. My son, who hadn't even touched the rocks, and I who wore gloves, were also sickened. This was from breathing the toxi...
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