That tank is definitely an oto/ nerite buffet and I love it! I actually like the green on the back and sides; i don’t mind the natural aesthetic and it reassures me the otos have plenty to eat. The tank is currently supporting the healthiest group of 8 otos that I’ve ever had and they’re some of my favorite fish ever! They have really flourished since I decided to embrace the green walls.
I haven’t cleaned the back or sides in months and it is so fun to watch. The otos have a favorite wall; the right side where the algae wall is thickest. The nerites seem to focus on one “patch” of algae at a time so the thickest patches of algae get cleaned in waves. Some weeks the left side will get cleaned and a couple weeks later the right etc etc.
I think I have 7 nerites now between the two tanks (29g community and 10g Cherry tank) I put the biggest 3-4 in the 29 and the rest in my 10. (I have one lone assassin snail in the 29 who so far has left the big nerites alone but I don’t want to tempt him with anything smaller than a few times his size.)