Thanks. It actually typically pulses faster than it did in the video these days. I put normal Xenia in my tank when it was only a few months old and it melted. A few months later I tried the Pom-Pom. It started to melt but turned around and it's thriving. I do not dose Iodine. I'm using Coralife salt and do a 20% water change every 2 weeks. pH varies anywhere from 8.0 to 8.2. Most often it is at 8.05. Alkalinity is usually at 2 meq/l (dKh = 5.6). Temp 80deg F Nitrate varies from 0.0 to 0.5 ppm Calcium 440 to 460 ppm SG 1.025 Mg 1275 ppm Phosphate 0 I found that Xenia really loves bright light. It's half way down under 6x54W T5s.