I have a 75 gallon tank with lots of live rock, a royal gramma, a true clown, a fairy wrasse and a cleaner shrimp that eats from my hand. 8) Someone gave me a pulsing Xenia today. I'd like to make sure I understand the basic care requirements because I've never had a coral before. I placed it on the live rock near "moderate water flow" but am not really sure what moderate flow is. It certainly is undulating but I don't know if it's because it's in direct line of the water flow or it's doing it on its own. :? Anyway, any info would be appreciated. Thanks!