Wow
londonloco, Aaron's method is precisely what I was looking for. I'm going to try it. Are you using the same or similar kind of black sand that Aaron mentions - "3M Colorquartz T-Grade Black Sand" as substrate? I see from your pic that the substrate is black.
One question though, why do you boil the soil?
Thank you. I have 10 tanks, the 75g is one of my favorites, plants and fish.
The 3M Colorquartz was discontinued last year, sucks too! It was the PERFECT cap, had great color, supposedly great CEC...sigh. There is another co that has come out with what I hear is the same type of material, Spectra Quartz. It's hard to find as it's used to make swimming pools. I have used Black Flourite, I like it enough to buy it again. I tried Onyx black sand, will never use it again, too fine, messy during water changes. If I was you, I'd try the black flourite to cap the mts with.
If you've ever soaked/dried/soaked/dried/and soaked/dried 120lbs of soil before, you'll know why I tried boiling it. It's not that much work, just long and boring. Tom Barr writes on planted forums about boiling and even baking the soil after it's sifted. I was setting up a 20g and didn't want to wait 3-4 weeks to mineralize it. Since I only needed a little soil for the 20g, I decided to give it a try. I didn't see ANY difference in the soil itself, or the way it grew my plants.
You need to read up on planted tanks. It takes a lot more than soil. The 75 gallon pic'd above has T5HO lighting with mid day bursts, pressurized co2, PPS Pro and Excel dosed daily. My 75g pales in comparison to some tanks on the planted tank forums. Like I said, it's a work in progess.
Hope this helps and good luck!