Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
As you keep adding water to the tank to rinse the sand, deliberately aim the flow of water into the sand. Keep stirring it, make the most mess you can.
Finally, drain the tank down below the level of the sand.
Arrange hills and valleys, add rock, driftwood, then plant (mist the plants).
Then put a plate or plastic bag over the substrate and refill slowly, allowing the water to trickle in over the plate and seep into the substrate without disturbing it.
There may still be a bit of haze, but nothing like the dense fog you now have.