Okay so I have three Senegal Bichirs the biggest one is named Rex ( because the pet store calls them dinosaurs bichirs) he is about 5 inches the second is named ter for pterodactyl he is 3.5 inches they are together in their own tank but tri for triceratops also because he is the third I adopted from a pet store because he was getting beat up so badly in the tank he is missing one whole fin he is only 1 inch long. Because of his size and condition I put him in a different tank to recover and grow till he can be added with the others. What els can I do for him besides melafix and aquarium salt?