Parameters? He is a bit heavy on the bioload IMO and overfeeding...well the algae will get worse! First tho cut the lights!!! 6 hours a day.
I dont know the exact name of that type of algae, I call it bottom slime and He will need more OTOS for that mess...I am building my crew to 6 to handle it all. If he doesn't listen, then he will have to risk the algacide....cuz if he dont cut back lighting and overfeeding it will just bloom more and other algae will bloom as well. I'd also suggest some algae eating snails.....