Aiptasia..run a search and you'll find a bunch of ways to get rid of it.
It looks like you need to get more flow going in the tank to combat the Cyano issue.
Have you recently changed the food you are feeding your clowns?
Add a few Peppermint Shrimp to the tank and you'll be good they eat those anemones. You mite want to get raid of the Red Slime Algae also. Get some Red Slime algae remover.