anything youre willing to lose! Haha. I have speckled rbtas that have formed their own colony on a rock in the mid section of my tank. Zoas can handle the stings more than the lps and sps ime, but cant do it indefinitely. See my image. Zoas, gsp on the same rock, monti, and to the bottom right thats a forrest fire digi that gets brushed every day. Still alive and growing...
