Black Spots On Anubias

I am getting black spots on my Anubias Plants. It’s not algae. I scraped all the algae off my plants and underneath it were a bunch of black spots. It will not come off. My planted Finnex light is on 10 hours a day.

 

I would either add floating plants to diffuse the light or lower the amount of time the light is on. It sounds like leaf burn if they are little holes lined with black edges.

 

Here’s a picture .

 

How long have these plants been in your aquarium? Are they new?

 

I’ve had these plants since early June 2018. The tank was set up in late April 2018. I use NilocG Thrive(weekly) and Seachem flourish tabs.Also, water changes(25%) every 10-14 days for my 10 gallon tank.

 

Bumping this up, sorry if not allowed. I'm having the same problem, but only on the lower leaves.