This morning I noticed that 2 of my goldfish, (one common/fantail, the other an oranda, both 1-2 inches) developed light... things on their fins. I'm not even sure how to describe them. Doesn't seem to be like ich where it's supposed to be salt-like. They're small spots on the fins that are light compared to the rest of the fin, and these areas aren't at the tips or ends of the fin.
My water parameters read:
ammonia: 0 ppm
nitrite: 0 ppm
nitrate: 40 ppm
Just as a precaution, I turned up my heater to 82-84 degrees Farenheit. It's been at that temperature for the last 5 hours or so.
My fish are still acting normal, actively swimming about, begging and scavenging.
Any ideas as to what this is?
Also, as of late, my comet goldie has been exhibiting strange behavior. Sometimes it would flash around the tank and I also noticed that it would have white stringy poop once in a while, though it poops normally as well. I also observed that it has a bunch of scales missing.
I've been feeding my fish mazuri gel and the periodic frozen peas.