One of my favorites!!! This little critter is dynamite! I planted two plants and within a week's time, they both produced runners, and I wake up to at least 3 new plantlets each morning! Needless to say, the gravel bed of my tank looks like its covered in the greenest of grass. My substrate is just your average gravel...no laterite, etc....and I use a dyi CO2 unit.
This a great carpet plant because it propagates really fast! It will need a good mineralized substrate, Co2 and high lighting for it to carpet, that is if you want it super thick and dense. As well it is a huge IRON hog, you have to give it a lot of IRON!!