Try and pull some out by hand, or siphon some out when doing a PWC
. Using Ro
water will help cut down on excess nutrients ( if you arn't using it already.. unsure from your post) as well as reducing feeding - how often are you feeding?
as for critters, depends on your preference. I have a sally lightfoot, about 10 hermits and various snails. They seem to do a pretty good job in keeping algae under control. I've heard emeralds are decent, for that as well. My cleaner shrimp seem to help pick up any excess food, too. Depends on your size of tank, but certain tangs and angels can eat some algae, too.