This plant is amazing. I went away for a few months, and when I came back it had established itself very well and grown 10 times it's original mass. It makes a lovely midground for medium sized tanks. Mine is greener than the picture but has brown accents to some of the leaves. It's growth isn't even that slow, once established. I have only topsoil and 8 watts of T12 light in a 40 gallon, no Co2, no filtration even.
i love this plant, it has grown well in both of my tanks (high light and moderate light) it grew great under both lights. but now that it is established in the moderate light it looks amazing. i don't use CO2. i did at one point use flourish tabs, and it is currently rooted in eco complete. i set it in some wood, so it looks out like it is growing out of the wood.
I have an old tank that was my first tank ever that isn't cared for that well. It's been going for a few years so it's probably got a nice layer of "fertilizer". It gets minimal light, the gravel is fluorescent blue, you get the picture. This plant grows like CRAZY in there. Absolutely no runners, but tons of new leaves (I even had some luck in that it didn't melt at all). I'm going to replant it in a moderately maintained 30 gal with good substrate and see how it fares.
I bought an immersed pot not too long ago, and it has already transitioned to submersed growth. The immersed leaves were a green color, but the submersed leaves took a more bronze color like the one shown in the photo. Great for low tech aquariums, but you will have to be patient because it grows slowly.