Recently have noticed a few small growths appear and then disappear on Darth Vader's right pectoral fin. This has been going on for a few months. They last for a few days then fall off or disappear. Don't show up for weeks then appear again. This week a few have appeared on the end of his dorsal fin as well.
His water is changed 2 or 3 times a week about 75-80% each time. He is currently in a solo 75 gallon (48x18x21) with lots of filtration (two Eheim 2017s, AC110, and a sponge filter, which are cleaned regularly).
I first noticed the spots/growths appear a few months ago after introducing some leaves I had gathered from outside and put in his tank as I usually do every fall/winter. I rinse the leaves off, but not more than that. I am wondering if the spots could be some kind of parasite introduced via the leaves? The fact that they disappear then reappear in different locations makes me wonder this though not sure. I hadn't worried much about them as they don't stress him out and haven't progressed (usually they dissappear and I forget about it) until today when I first noticed them on his dorsal.
The photos are where the spots are now and a short 10 second video to give a better sense of them in "real" time.
Thanks for your suggestions and comments.


His water is changed 2 or 3 times a week about 75-80% each time. He is currently in a solo 75 gallon (48x18x21) with lots of filtration (two Eheim 2017s, AC110, and a sponge filter, which are cleaned regularly).
I first noticed the spots/growths appear a few months ago after introducing some leaves I had gathered from outside and put in his tank as I usually do every fall/winter. I rinse the leaves off, but not more than that. I am wondering if the spots could be some kind of parasite introduced via the leaves? The fact that they disappear then reappear in different locations makes me wonder this though not sure. I hadn't worried much about them as they don't stress him out and haven't progressed (usually they dissappear and I forget about it) until today when I first noticed them on his dorsal.
The photos are where the spots are now and a short 10 second video to give a better sense of them in "real" time.
Thanks for your suggestions and comments.

