guppies are like a box of chocolates, ya never know whats going to show up. looks to me like they will be fairly plain, with a little color in the tails.
you could tie them on to something, superglue them to something, or plant them. they are a rhizome plant, so if planting in substrate, only plant the roots, not the rhizome.
those are the roots of new plantlets growing under the leaves. let them get a bit bigger, then you can pluck them off and plant the new ones where you want.
about what i did with my 120. the original hood had 2 48" flourescent tubes in it. i gutted that out, and made a few small notches for the legs, and a small notch for the cord, and stuffed an LED light bar under it. so much nicer, and runs cooler to boot.
amen! once you get to 55 and larger some sort of water change system is really needed. i like the python, but a big bucket and pump would also suffice.