My OOlite does the same. Some of it stays suspended in the water column. My Dragon wrasse likes to dig holes in the sound. He creates giant clouds of sand into the water column. This will make the water hazy for a few days. I need a roller mat to see about clarifying the water, but the fish does it almost daily so, I might just be transporting the sand into my roller mat... Expensive way to remove sand! I'm hoping it settles down at some point... The wrasse, or the sand moving into the water column.
The stinker puts his tail in the sand and wiggles as fast as he can, then turns around to see if he found any buried treasures, then digs some more. Emits puffs of sand particles into the water column. The next day I'll find a pile of shells that he found around the tank all piled up in one spot.... His little treasure pile. I need to get some large chunks of shrimp and bury it in the sand for him to find. LOL. (Probably not best for the tank's health.... )