Hi all, for some background- I have owned this fish for about 6 months now and up until a week ago I had him in a 1.5 gallon tank with a heater and filter. About a week ago I purchased the fluval chi 6.6 gallon aquarium and moved him to that. It also has a heater and I add the fluval water conditioner and biological supplement as well as a tbsp of aquarium salt. He has been doing great and seemed very happy with all of the space in his new tank.
I went to feed him at 11am this morning (I last saw him at midnight last night and he was fine) and he had disappeared. At first I thought that he had jumped out and one of the cats had gotten him, but I decided to take the filter apart just in case. There he was, sandwiched in between the filter media and the sponge. I have no idea how he could have gotten in there- none of the openings seem big enough for him to fit, and I don't know how long he was trapped there- at the longest it would have been like 10 hours. Anyway, at first I thought he was dead but when I picked him up he wriggled a bit so I put him back in the water. He seems to be ok except for a piece of scale missing above his right eye and a couple very small tears on his fins. He appears to be swimming fine but does seem weaker than usual. He is normally very active and social and darts all over the tank. He is still swimming around now just more slowly.
I have gotten quite attached to him and I really hope he can pull through but I'm not sure how to proceed from here. Any advice? I have attached a couple pictures of the wound on his head though they are not the best quality.
Thank you for your help