Hi Im a newb to fish keeping my 55g tank is been up for about 3 months. I'm just starting to plant it. I've been going through a ICH problem finally figured out my fish were stressed due to the tempature I was keeping at 74 and most of my fish like it around 79/80 according to my research. Anyway they are on the mend but yesterday I lost an angelfish. When I bought her (bout 3 weeks ago)I was such a newb didnt pay attention her tail. On further inspection she appeared to have alot of nippage. After putting her in the tank she was very solitary despite another angel being in there. She was always hiding. I attributed it to shy. Once I adjusted my tempature in the tank she was always then around the heater never seeming to move from it. yesterday morning I got up turned tank lights on and such and notices "fuzz" on her tail. Light grey, dirty white fuzz. Also she didnt seem to be able to close her mouth. I did some research and the closest I could come up was a word that began with an SP and had the word mould in it. Although the pics really didnt appear to match. Not sure as to the treatment I just kept watching her. My gouramis who always seem to sense weakness started biting at her eyes and fins, I knew then she was definately dieing. Not having a quarantine tank yet I simply put her in my breeder. Knowing she was dieing I figured I'd let her die on her own terms and not let the gouramis put her thru more than she was obviously going thru. She died last night. My question is does anyone have an idea of what this might have been? none of my other fish have it. If I see it again I'd like to be able to save the next. Right now I"m doing water changes everyday as the ICH clears. Any help would be appreciated. :bowing: