Nope, I go way low tech with my tanks. I do use Flourish and Flourish Excel (a CO2 substitute) in some of my tanks. If you decide to use Flourish Excel, be VERY careful with it - don't use it on a new tank, and use less than the recommended dose for tanks with crypts and wisteria. I prefer to start out with 1/3 the recommended dose after a tank has been established for a week or so and gradually work up from there.
Depending on your plants, you don't even need to use fertilizer since in an NPT the soil provides sufficient nutrients to roots.