Who Gives A Fish Forums

I'm running Alkalinity around 8, Calcium's at 440, and Magnesium's 1320. Phosphates I'm still figuring out, but Nitrates are usually between 0-10. pH's a bit broader, 7.8-8.3, but it seems to work. I've had pretty good luck with these parameters, can keep a wide range of corals without too much ...

They resemble Vayssierea sea slugs, similar to those listed in this link - http://www.lionfishlair.com/hitchhikers-guide/

I've had my fair share of Asterina starfish issues with my zoanthids in the past, and I gotta say, I wouldn't be so quick to write them off as innocent. There's just too many reports of them wreaking havoc on zoa colonies, and having that many in your tank is a pretty big red flag, if you ask me.