Hello I am new here and hope to have some help I dont know what to do. One of my goldfish got stuck in one of my fish decor. My parents where taking care of feeding them for some days while I was out (I am currently moving) and they noticed he was stuck and tried to get him out. Since we think he had the whole night like that when he got out he was missing some scales and barely swiming. I told them to put some medicine (supposedly natural) and waited to see if he improved. 2 days later they send me a video of how he is and my parents where worried, he has his tail and fins torn and it looks like he has fungus with white eyes, he also lost alot of scales. I was so worried I had to go where they are at and I did a big water change and moved my goldfish to another tank (the only one I have is 6.5 it has proper heater and filter I know its too small but that is all I have) and put some slyme coat and medicine. I read I could give espom salt but I want to be sure before taking that step. Can someone tell me what to do? I really care for my fish and I want him to survive.