My betta has the beginnings of fin rot. It is mild but it is definetly starting. I was told to use aquarium salts to start with to promote healing but I was wondering can I add the salts right into the water with him in the tank? Will it shock him? He has never been exposed to aquarium salts before. He has had an epsom salt bath twice and did fine. I know the aquarium salts are different and desigened for using in the tank but I just am airing on the side of caution. Thank you for your time!