I have a NPT, I added T5s, started dosing ferts, will be adding CO2.... I love the benefits from the soil though. You get amazing results, especially when the soil has become matured.
A tank with low lighting won't run out of ferts very fast. Slap some T5s and you need to fertilize, or you get algae... This is because the plants are growing way more and using more nutrients. The soil will help a lot, but adding Seachem Flourish is also good. NPTs can have have anything added to them. The meaning of an NPT is natural planted so any NPT is still a NPT.
I am using an airstone at night for a variety of reasons, when I have diy co2 I don't want to gas my fish and it provides agitagtion to get the stupid biofilm off. (If you have other fish besides bettas, biofilm is bad as gas exchange is very low.
15 Gallon NPT
1g no tech bowl in the making