Gardening Tips?

Greetings everyone! I finally have a planted tank. Right now there is no real aquascape, but Connie and I are partial to the Dutch style. We are taking a "shotgun" approach, buying plants from the LFS (Albany Aquarium, great place), planting them, and observing what "takes". Can anyone give us a few quick and dirty tips on how to garden these plants? We have one they were calling "Reineicki" that was red when we brought it home, and is shooting roots off like crazy.

We also have a Red Ludwigia. It has lost most of its red color, and was really "leggy" when we brought it home. Hopefully you can see the roots shooting off...

We have a few Lobelia that are doing well...one in particular has hundreds of roots shooting off of it...

The other plant that is doing very well that I was looking for advice on is the hairgrass. here is a pic:

Any gardening tips would be greatly appreciated. Obviously we are hoping to propogate and fill in the different layers.

You might notice some brown algae, or what I take to be "diatoms" on some of the leaves...they come off easily just by brushing them with your hand. Lighting is 2x33 watt CFL with an 8-hour photoperiod, fertilization is DIY CO2 and weekly Seachem Flourish. Substrate is Eco-Complete black planted. Thanks, and here is a pic of the entire tank 1 week after planting.

Peace,

Jason