Eddie - if the tank is established for a while and you want to go planted here are your options, and a general guideline of what to do:
first choose what type of plants you want...choosing the type of plants allows you to choose what and how much light, fertilizers, co2, etc... low light plants are less maintenance, require less light, less ferts, less co2, etc afnd are a good starting point IMHO.
- choose a substrate (play sand, eco-complete, flourite, laterite) all up to you. the last 3 have nutrients in them and are $$$$ the play sand does not and is really cheap.
- thoroughly rinse substrate NOTE: only if it needs rinsing as per packaging or our suggestions
- put your fish in a bucket/container with an air stone, (and water).
- take out 90% of your water
- Scoop out old substrate
- replace with new substrate.
- Refill tank adding proper water conditioner
- turn on filters
- Add Plants (or see bullet 2 below here)
- add fish once your tank relatively clears.
- Add Plants (if you dont want to bother doing it right away because you probably just did 3+ hours worth of work)
Note: if you are using playsand you will need root tabs. you can buy your own or make your own. If you are using Eco-Complete, Flourite, Laterite you dont need root tabs (not normally anyway) because they have nutrients in the 'soil'
Note: yes plants need food, nutrients. How much and what depends on a lot of things (mainly light)
NOTE: lighting do a forum seach for DIY Lighting Projects (specifically the Redneck lightin project i think it is called. zigman wrote it up and iused it as a guideline for my setup.)
NOTE: It is not that hard, expensive, or time consuming as some may lead you to think. take your time, research, relax.