Been dealing with a solid case of green turf algae and have have not used any chemicals and have it slowly dying off. All i did was cut lights to 8 hr days on all blue with 15 % cool white as well as carbon and phosphate remover and after a week its turning white and dying off. Gonna do a second 30 gallon water change for the second time since its dying off to keep nutrients low. Urchin and emerald crabs are eating it but they only controlled it a little bit. Full sps dominant tank so i didnt wanna use chemicals and it seems to be working. Anyone else have luck with doing it like this. Patience and some manual removal is key.