I have a ten gallon aquarium and has been running smoothly, doing weekly water changes. But recently I have noticed some brown spots on the gravel, decor and on my Anubis nana. I have just been wondering if it is anything to worry about.
p.s. I am pretty new to fish keeping so I apologize if it is a careless mistake
p.s. I am pretty new to fish keeping so I apologize if it is a careless mistake