A neighbor has a zenia, rather large one in her 50 gal. soon to be 125 gal.. It has been in for three months, maybe less. She knows a little of what this forum has been discussing but not understanding the ratios yet, {nor do I}she still has just as much a problem with red and hair algea. She will be running an ro system with her new tank. I note that her zenia reaches out longer all the time and it does pulse. I will be getting a few of her frags. Very few. It is an interesting coral. Just commenting. Still trying to figure all the input out you guys have sent in.