Fishkeeper
Crowing
What kind of goldfish is this? A comet goldfish (shaped like a fish but with a long tail) or a fancy (shaped like a fist)? It's possible she's dying of old age.
Pictures of the scale loss would help.
I would photograph your algae eater and post it here so we can figure out what it is.
Also, fish aren't good solutions for algae control. There are very, very few species that eat only algae as adults, most of them want more protein, and it's not good for them to expect them to live on scraps. If you have algae on the walls, just wipe it off. Algae on any other surfaces, just ignore it. It's harmless, and in fact has some minor positive effects because it helps keep your water slightly cleaner. Like plants.
Pictures of the scale loss would help.
I would photograph your algae eater and post it here so we can figure out what it is.
Also, fish aren't good solutions for algae control. There are very, very few species that eat only algae as adults, most of them want more protein, and it's not good for them to expect them to live on scraps. If you have algae on the walls, just wipe it off. Algae on any other surfaces, just ignore it. It's harmless, and in fact has some minor positive effects because it helps keep your water slightly cleaner. Like plants.