I'd use 2 x normal output FL's for lighting instead, a cool white and maybe a Triton.

If you do use a T5, make sure it's high, about 4-5" above the water so that the light will spread out more before going into the water.

Flourite or Onyx would likely be the best bet for you here.
Onyx will add Ca and Mg as well as KH.

You may use peat and a little soil if you wish as well.
Mulm is not big issue, a dirty old sponge filter would be nice though.

What is a big issue: adding enough plants from the start(pack it!), picking the tank clean in the first 10 days or so, no water changes, adding easy to grow plants etc.

Add a little bit of ferts, 1-4x a month, add lots of herbivores, SAE's, Amano shrimps, otto cats etc.

Then after things settle in good, add the CRS's and remove the others.
Take you time there. Patience is rewarded.


Prune and trim, avoid uprooting, have some floating plants.

Regards,
Tom Barr