Hey Growmie, I also use advanced nutrients, but am using soil. When I mix my solution, and thereโs some left over in the pail, thatโs what I see after a day or two of it sitting. Little brown floaters that look like fish foodโฆ obviously not a solution that can be kept for very long. I donโt think itโs specific to you, adjust how long your solution is kept in reserve and see if it changes. Good luck Growmie โค๏ธ๐จ๐ฆ๐