We all have to be a rookie for all things at some point in our lives, so I am happy for a forum such as things so we can help each other out
I would probably fast him for another 2 days or so. But most importantly, since you have already fed him, did he start to exhibit his floating again (this is the real test)? My second boy used to do this, even though he was not bloated, but I think somehow there was some kink in the connection of his stomach and his swim bladder that after he ate, he had positive buoyancy. Thank goodness his problem seems to be resolved now.