So I have a 30 gallon with 4, 2.5 inch goldfish they are going to a pond when bigger. , I also have a pleco in there. Anyways my tank got ich and thought it was not a problem. Then I ran out of medicin but the ich seemed gone but came back worse. One fish developed a red line on his fin and I looked it up I don't remember what is called but its a bacterial infection. So my problem is that my tank is deeply horrible with ich and my goldfish are starting to get fin rot all of them! Some are worse then others. I've been treating with medicine, ich cure and then I been putting melafix too. My fish seem to get worse and worse please help