HELP!! White milky white fungus?? - goldfish sick - HELP!

I posted on another forum but no-one ever had a suggestion. I put another fish in with my goldfish about a week ago. My goldfish has now developed this milky white substance over what looks like his eyes and some of his fins look like they are deteriorating. I've been trying to treat with LifeGuard but it doesn't seem to be helping. He's not eating. Anyone know what this is (see pictures)

 

Water change. First thing, do a 50% water change immediately. It looks like mouth rot, and I'm not sure what's on her eyes, but it's bad. She'll probably be blind if you save her from this. How big is the tank? Goldfish need at least 20gallons, and that's just fancy ones. What kind of fish did you put with her? And it seems you don't know what the nitrogen cycle is. I'll give you a quick idea of it.
Fish goes in tank and produces waste. Waste breaks down and becomes a poisonous substance called ammonia. Ammonia burns and kills fish (Those light patches on your fish are burns from it). Then, after a while, bacteria grows to eat ammonia.
Ammonia-eating bacteria have their own waste, though, called nitrite. Nitrite is also very bad for fish. It will kill them and take oxygen out of the water, suffocating them. Good bacteria will form after a while to eat this.
Nitrite is then turned into nitrate. Nitrate is fine if kept under 80ppm. Bacteria that eats nitrate can (I think) Only be found in tanks with a sump, which is an extra filter tank kept behind or below the main tank. To get rid of nitrate without a sump, do water changes.
Your tank is probably not cycled. Ammonia, in any amount, will weaken fish and make them more likely to develop diseases. You fish has some form of fungus. Are you sure she is alive? If you are sure, go to your local pet store and and buy Maracyn or Maracyn 2. Dose half the recommended for 3-5 days. I think you should also raise the temperature of your tank. After treatment is done, do a 50% water change. This is all vital. Continue doing 25-50 percent water changes daily for the next few weeks once treatment is done.
You need to also buy a tester kit. API Master kit is the best things, but if you can't afford it, test strips will be okay until you've saved up enough. You want to be able to test ammonia and nitrite. If you see any of either, do an immediate water change.
I know you're probably very confused right now, believe me, we all were! But fishkeeping is a lot more complicated than usually let on. Once you've got the basics down, though, there's a whole world to be explored when it comes to fish!
And also, welcome to Fishlore! If you have any more questions, don't hesitate to ask!

 

You kind of got it mixed up. Fish produce ammonia, beneficial bacteria process the ammonia turning it into nitrite then into nitrate. You may want to treat your fish with API Pimafix to hopefully get rid of that infection. And yes weekly 50% water changes are a must

 

Oh also I would use tweezers and pull the white stuff off. She will be able to see better if you do that. She may heal if you are very careful and your tank is clean.

 

You kind of got it mixed up. Fish produce ammonia, beneficial bacteria process the ammonia turning it into nitrite then into nitrate. You may want to treat your fish with API Pimafix to hopefully get rid of that infection. And yes weekly 50% water changes are a must

Sorry, I'll double check next time I explain.

 

That's ok were all learning