?????

[Kphillips6]

What is this stuff just above the ramshorn snail? It's just to the left of the bettas tail. I'm guessing that it is some kind of algae but it wasn't their a couple of days ago 

[Beardedbillygoat1975]

On the coconut shell it’s green hair algae. On the leaves of your anubias it looks like detritus and mulm with some algae. Might be getting the start of black beard algae or staghorn. 

What are the inhabitants? What are your parameters? What’s your light and ferts regimen? water change schedule? Tank placement- any direct sunlight? 

[Kphillips6]

78 degree temp, no direct sunlight, 9 hours of light, sponge filter and hang on the back filter with charcoal insert, 7.4 ph, 0 ammonia, less than .25 ppm nitrite, 20-40 nitrate medium lvls for kh and gh. I do a 30% water change twice a month. There are 4 endlers, 4 female panda guppies, less than 20 2 week old fry, 1 emerald cory(the others unfortunately have passed months ago), 1 betta, 5 kuhli loaches, some pest snails, some ramshorn snails, and some cherry shrimp. 

The black beard algae is finally going away and the hair algae comes and goes, the diatomaceous algae gets left as food for the snails. 

The whiteish greenish film is quite new and slightly alarming cause it wasn't there a few days ago.

[Beardedbillygoat1975]

The stocking is a bit high for that water change schedule. Agree with @Tankseeker25% weekly would make more sense to me. Whiteish green film?  Maybe Cyanobacteria? 
I think it’s interesting you’ve got nitrites. Does the water have a color or hue to it? Any odor? 

[Beardedbillygoat1975]

You could do 50% but if your fish aren’t used to that volume of water change you might want to ease into it. Go 30, 40, then 50 over successive weeks. 
Do you know what your water parameters out of the tap are? Some water supplies have nitrites/nitrates in it. Something to consider.