Can anyone tell me what is this on my sand? Have tried everything and nothing seems to work. From lights out to barely feeding to chemiclean , vibrant even siphoning the sand blowing the sand and it keeps coming back.
So I ask myself does the sand in the aquarium have to get replaced? Don’t know what to do any more
![0FD1906F-FF3B-4886-822A-EF10EA1744ED.jpeg 0FD1906F-FF3B-4886-822A-EF10EA1744ED.jpeg](https://test.reef2reef.com/data/attachments/2981/2981006-b946efd278b74877a6e24b44acc63a90.jpg)
So I ask myself does the sand in the aquarium have to get replaced? Don’t know what to do any more
![0A3444A0-2AA2-4EE2-A45D-4399C16390BC.jpeg 0A3444A0-2AA2-4EE2-A45D-4399C16390BC.jpeg](https://test.reef2reef.com/data/attachments/2981/2981004-f7c6c427662793a20da92261aa7bdfaf.jpg)
![7FF6A01E-889C-4170-A59A-0ED59E3A14E3.jpeg 7FF6A01E-889C-4170-A59A-0ED59E3A14E3.jpeg](https://test.reef2reef.com/data/attachments/2981/2981005-6767f08fec948340eb9d485c8b04c49b.jpg)
![0FD1906F-FF3B-4886-822A-EF10EA1744ED.jpeg 0FD1906F-FF3B-4886-822A-EF10EA1744ED.jpeg](https://test.reef2reef.com/data/attachments/2981/2981006-b946efd278b74877a6e24b44acc63a90.jpg)