Originally Posted by standoyo

Dom,

Powersand is base layer but is not a base fert. Let me explain why. [che wah...like salesman! A recently known fact to me as well. ]

Powersand is pumice coated[a secret recipe] with some food for essential planted tank microorganisms to create a healthy underground for roots of plants where these microorganisms[the famous 100-bacter 100!] continually breakdown wastes produced in aquarium.
So in Aquasoil+Powersand tanks you will rarely see or smell BGA. stick your finger in mature ADA standard tank[As+Ps+all the other ingredients] and compared with normal sand+base fert tank. The longer time pass, the worse the sand tanks will smell but no smell from ADA tank.

Note: Aquasoil CONTAINS the stuff the plants use!
It's soil in granule form that can exist on the top layer not like those sand+base fert tanks where the soil has to be the base fert because it will fly around in an aquarium.

Regards

Stan