I've had the same couple of ghost catfish for atleast a year and a half of not two years (it's been a while lol), not sure how old they were from the pet store either. I've started noticing one of them getting cataracts and can only think they are getting up there in age. Does anyone know what to look for and to watch out for when they do get older and closer to their life span? Water levels are all within normal and clean and had recently changed out my fine gravel with caribsea sand for my corydoras. I did however move my moss ball that was taking over the tank, to a separate filter tank because the older looking ghost catfish would freak out and get tangled in it and act dead whenever I would clean the tank.