Hair algae??

[Myka]

If you pull on that algae does it come off easily or is it difficult to remove? If it comes off easily it is probably a type of hair algae. If it is difficult to pull off then it is probably a turf algae. The difference? Not much, other than manual removal of turf algae is difficult. Mexican Turbo Snails and Scarlet or Blue Legged Hermit crabs are the best for filamentous algae in my experience. I prefer Scarlet hermits over Blue Legs, but more people don't want to pay the price difference.