hygrophila

I have been fighting to figure out what this black stuff on my Anubias is. I presume its algae, but i have 0 phosphate, Nitrate, nitrite, & ammonia. The canister filter has been cleaned and replaced with fresh media. Not Pictured: I have 8 Otoc Cats and a few Amano Shrimp that wont eat this...

Hi guys, I recently used some aquarium solvent, clay root tabs (clay balls with nutrients), and some rocks to plant the flora named in the title onto the rocks. Does anyone have any experience regarding growing these? I am using CO2 and high light levels. Thanks in advance!

Hello, what do you think this is?  I was guessing some sort of ludwigia or hygrophila, but I could be (and probably am) completely wrong.  I searched a bit on the internet, but didn't find anything super close looking within 20 minutes, so I gave up and did the lazy thing and posted here:    ...