Welcome to the community. From the sounds of it without knowing exact flow and parameters sounds like some cyanocobalamin bacteria is starting to take hold placing power heads strategically can help with this a great deal beforecit gets to bad i would also siphon it out with your water changes. T o try and get a head start on being rid it. Also your tank is still pretty new and has a bunch of changes going on in it different types of bacteria fighting for realistate still. You can also try cutting back on how many hours a day your lights run this will also help until your tank matures. Most in important thing to do at this point would be to just keep up your scheduled water changes and cleaning. It will start to sort its self out as the tank matures keeping your water changes ,cleaning and parameters in line as you have been doing. It can take a while for a saltwater tank to balance out.Hi so I am new to reef tanking, I have a 11 gallon nano, and everything had been going smooth for about 2 1/2 months. I added to juvenile clown fish and one emerald crab to help with the clean up, I have 5 corals inside all softies. I have been checking my chemistry every Sunday and recording the numbers, everything is within normal parameters. Doing a 20% water change as well on sundays. Feeding the fish every 2 days with only about 3-4 bites each of frozen food. Now the issue I’m having is I’m getting red sand and during the time my light is on for about 8 hours. Checked phosphates they are normal levels, changed the water didn’t help. Changed the lighting spectrum didn’t help. I’m out of ideas and could use the communities help. Thank you
Always here to help!!

