Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
High CEC, so once you get going on the ferts the substrate sequesters some of it for later.
I used a 50 lb bag for my 125, 6' x 18". I had a couple of bags of EC in there, too and ended up with about 2" deep substrate.
Dampen it so you are not breathing the dust.
Set up your hills and valleys. It will not hold slopes without a retaining wall (rock, driftwood). Dampen it until the water shows in the lowest spots. Barely.
Plant. Mist that plants as you go.
Put a plate or plastic bag over the substrate.
Pour the water in slowly over the plate, allowing the water to seep into the substrate.
This is the best way for the least clouding.