Yes, expelling of some zoozanthellae is not unusual at first. The changes in light and water conditions the anemone has gone through since collection results in the expelling, I assume. If you want the anemone to grow quickly, I would suggest feeding three times per week fresh seafood items about the size of a peanut, then a cashew once it gets a little bigger. I have a crispa and it likes shrimp, squid, krill, pieces of fresh fish from the grocery store (don't try canned tuna, I made that mistake long ago). I go through phases where I feed and periods where I don't. The anemone pretty much just stays the same without any feeding, but will start to increase in size within a week of more frequent feeding. So if you have the space where it won't be stinging or getting stung and you want it grow, feed it. Just make sure the water quality is in good shape--around 80, preferably undetectable nitrates, sg 1.026 (on an accurately calibrated refractometer), moderate water flow.
