Any idea what these black spots are on my anubias?

[CarloM12]

Hello I have been seeing these black specs on my anubias leaves a lot lately. I have a 75 gallon tank with a fluval plant led light. NA Thrive about once a week with an eco complete substrate. It looks like algae but I don’t think it is

 

[Colin_T]

algae

 

[CarloM12]

algae

I got nerites and ottos in there I’m kind of shocked.

 

[Slaphppy7]

They can't eat it all, especially if it is continually growing

 

[CarloM12]

They can't eat it all, especially if it is continually growing

Do you know how I can get rid of it it seems to be on the leaves closest to the light.

 

[Slaphppy7]

Try decreasing your lighting period.

 

[CarloM12]

Try decreasing your lighting period.

Did that but I’m not sure it’s it. I tried taking it off it’s very difficult almost like it’s part of the leaf now. What else would you do it’s really only on these leaves most visible to the light. Light is on 8 hours during the daytime the rest is sunset and sunrise. I also can’t really get my Amazon swords and other stuff to grow tall I’m not sure if it’s too much light or what the issue is with that. They are really healthy and give off loads of leaves however they never grow taller than maybe 5-6 inches.