Aiptasia & Little White/Grey Stars

Yes aptasia can spread. I use kalk/lime paste. It's cheap to buy at walmart its called pickling lime. I just make it into a paste suck it up into a syringe turn off the pumps and put it right on the aiptasia. Don't do too many at one time but you can do several, then wait a few days and do some more if you have a ton. You can also try peppermint shrimp as long as you get true peppermints they do a great job in my experience.
As for the star fish I know some can be bad and eat zoos while others are fine, if you see them eating something they shouldn't try pulling them, if you have a ton of them a harlequin shrimp will help take care of them but then you have to either sell the shrimp once they are gone or buy other star fish to feed it.

Edited by bstuver - June 16 2016 at 5:07pm