Any suggestions on helping out my 12" Armatus. He got spooked and slammed into the glass and now for two days he still can't swim. I try to wedge him in the upright position with driftwood but as soon as he moves he turns upside down. I did a water change and I am keeping the lights out but I don't think he is going to pull through as he can't even swim or hold himself from flipping over. If this one goes down that will be two I have lost! Still have one left!