Welcome to the club, there is some great people here who are glad to help. I went through a spurt with Dino 7months ago. From what I read it Will come back periodically. First r.o. water is a must if you have not been using you need to switch asap and start the water changes. Second diatom and dino get confused, you can tell if it is in fact dino by observing the sand. if the sand seems to look worse through out the day and better in the morning you have dino. Here is how I treated it. I did a series of large water change through using a gravel cleaner, trying to remove the dinos. then I left the lights off for 3 days. The corals bounced back as I had only zoes