I was reading a really cool article recently about the Lettuce sea slug. The author said that he/she never had much succes until he/she tried the sea slug in a tank that had really strong lighting, and an overwhelming amount of bryopsis.
the most interesting part was that if the tank had enough bryopsis to sustain the sea slug through its whole life time then it would never eradicate the algae, which seems to indicate that lettuce sea slug's are a poor choice of bryopsis control compared to other methods.
:happyfish