It's growing slowly, maybe slower now, but no swelling, so is it the infection?By the way, will he grow back if I give him a clean environment? Thank you a lot!Sadly, there is little known about healing cephalopods. Is the white swollen? Is it growing or stable? If it is stable and not swollen, it is likely not to get worse. If you see swelling or spreading then infection is likely a problem and I would continue trying to get it to take a small quantity of Tetracycline daily.