Planted Tank Obsessed
Join Date: Jun 2016
Location: Burlington, Ontario Canada
Personally I would really reconsider the the idea of topping AquaSoil with play sand.
My reason for saying this is, the sand will eventually just settle into all the open pore space around the AquaSoil and in the end you will have AS on top of sand.
I'd pick one or the other and avoid the mixing. Just my 2 cents.