Ok, so I want to start a 100% live planted tank, but I am a little confused as to where to start. Here is my plan and let me know what you think (those of you that have planted aquariums). I also have a few questions.

Ok, I am setting up my 30 gallon aquarium. I have a powerfilter, an undergravel filter with a power head that will run on one side only, Two 15W flourescent bulbs, small-pebbled sized gravel, some driftwood, and the other usual items. I want to possibly buy some Laterite to put below my gravel. I want to make a homemade CO2 injector with a 2 liter pop bottle, connected to an airstone that goes directly into my power filter intake. And that is that… Let me know what will work, what won’t and what suggestions you have or any personal experiences you have.

I would also like to know:

1) Does Laterite need to be replaced periodically?

2) How essential are trace nutrients for plants? If so, what nutrients do I need? (the amount available is staggering)

3) How essential is a method of measuring my CO2? Can I just sort of wing it with my home made system without worrying about having too much CO2?

4) I have heard that the undergravel is not the greatest choice for plants… should I just remove the power head and keep the grates, remove the whole undergravel system, or does it even matter?

Thanks so much in advance, I look forward to hearing some great info!!