I have a 90 gallon and am running the herbie method that has been up and running for about 5 months. I constantly see small particles, looks like sand but all of my power heads are aimed upward away from the bottom of the tank. They are not all uniform in size and are definitely not air bubbles. i believe it is the very small sand particles as i started this tank with new "live sand but this has been going on for weeks, I assumed the filter sock would take care of the problem but it hasn't. I am not sure if that is due to the sock itself or if these particles aren't making it into the overflow or what. I think the issue is that they are not making it into the overflow as the current in my tank is very random.
Could i just put some filter floss in a filter sock and leave it in the DT for a couple of days? Any other ideas on how to fix this issue?