question about reusing aquasoil and powersand
I have a tank that I'd like to rescape with about 1 year old ADA Amazonia and Powersand Regular. When I first set up the substrate, I followed the ADA directions of laying down the powersand first, then the aquasoil and capped with the powder type. After some aggressive aquascaping, a lot of the powersand is intermixed. If I reuse the Amazonia, I'll probably cap it with some new Aquasoil for a uniform appearance.
My question is: am I negating the powersand benefits by having it uniformly mixed in the substrate? OR - Does it need to be at the bottom?