[TwoTacoCombo]

Hydrocotyle tripartita will grow well in lower light with no co2. The trick is to keep grooming it and steering it in the right direction. it has the tendency to grow up into a ratty bush, but if you keep pushing it into the substrate it'll eventually just take off like a runner. You can cut parts off of it and replant at will. It won't ever carpet like HC, but it'll give some good cover fairly quickly. Mine ran 1/3 the length of a 20g long, turned the corner and is halfway to the back wall, all within about a month.

 

[TwoTacoCombo]

Yes, just rip it up from where it's headed, push a couple spots into the substrate and shovel a bit on top and it'll stay. It's extremely resilient. I constantly cut it up and replant it elsewhere. If the runner gets too long, cut it, rip it, stick it back in the main area and it'll continue to grow. I attached a photo of mine before co2. you can see the main mass on the right, and the runner taking off to whoknowswhere. After co2, the stuff grows like a forest fire. I had to start chucking large pieces of it because I ran out of room.

PS, nevermind the val in the foreground, it's just on vacation.