Yellow head jaw fish trouble.
Hey everyone I am having problems with my jaw fish digging under my rocks that are my man support for the rest of my rock. I was wondering if anyone had any advice on how to keep him from doing that. I'm just wait to hear a crash bang boom and coming down stairs to find out that he collapsed my rock and broke the tank. Please help. Thanks.
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29 gallon oceanic biocube HQI 
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