Hello. I've had my fire eel for about 4 months now and he has been fine the whole time. He eat all the time and seemed healthy. Well that was up untill last night. At first he was out and about which is not normal cause he's allways normaly hiding. He was swiming at the top of the water. Now by the next morning he seems very weak. He is laying on his side some times. I can put my hands in the tank and pretty much hold him if i wanted to, normaly he would swim away at a fast pace. He also has a white powder like color on his skin starting from his tail. My sucker fish was attacking him and like sucking on his body and cause he was so weak he couldn't get away. I dunno if the sucker fish did this to him or not. As of right now the sucker fish is outta the tank and in my african clawed frog tank. Does anyone know what might be wronge and what can i do to maybe save my fire eel?