tiger cowrie

Hi expert, i added a tiger cowrie in my mixed reef 2 months ago.. it is moving around the tank and grazing well. I am noticing that i have lesser and lesser algea on the rocks and a little worried that the cowrie might not have enough food to eat and will starve. Any suggestions on what and how...

I am having an issue with some of my Zoa frags being flat out devoured by something in my tanI while others go unmolested. The dastardly deed happens over the course of a 24 hour period and the only critter I ever see near them is a typical small CUC hermit or snail. Could my PB tang or...