Originally posted by Crocodylus
only with low lighting plants like anacharis, hornworth, cabomba, etc. on a 10 gal aquarium doing 1.5W/G
All three of the plants you mention need particularly strong light, actually. Many people give up on plants because anacharis and hornwort are sold as "easy-to-keep" and cheap varieties, while they really aren't so easy. The beginner gets discouraged that the hornwort is getting "leggy" and/or losing its needles, and the anacharis stem is constantly rotting away at the bottom, eventually completely going to mush... To make matters worse, beginners tend to shy away from *actual* low-light plants, like Anubias spp., Java moss, and Java fern because they usually sport the higher price tags. A low-light fully-planted tank is entirely possible, when one chooses appropriate plants.
That said, with CF lights, anything over 2 wpg is enough to grow just about any plant. Of the plants you say you want to keep, I'd only worry about the riccia, if it's being tied down, but since I've never tried it myself, I can't say for sure if there is reason to worry. Are you going to inject CO2? You probably should.