A few updates:
-The tank went through a mini-cycle when I added the substrate. This may have been caused by the rapid drop in PH (went from 7 to 5). Every thing is stable now although my KH was nearly 0 at first so I added a big chunk of fossilized coral with plants attached to raise it up a little bit.
-The PH drop also wreaked havoc on my crypts - they disentigrated into almost nothing. However now most of them seem to be recovering and growing back. All the other plants are fine.
-As soon as the tank was cycled I added 12 neons and ~15 to 20 RCS. They've been in there for a week and are doing great.
- I also ran DIY CO2 (single bottle for now) with the output going to the powerhead intake. Not quite ideal, and I'll probably rig up a glass diffuser or a reactor later on.
-Still waiting on more plants and driftwood, so I'll post pics when they come in.