Cool good advice! I'll make sure I split it regularly.I'm going to guess at nana. When I redid the tank 3 1/2 years ago I used to divide it regularly and glue the new bits to an empty spot on the wood, its actually lots of plants rather than one big one. It does grow much faster when newly cut. Be warned this is a super low light tank and there is some healthy BBA on some of the leaves. Never bothered trying to clean them because it is quite a low level and there is no BBA anywhere else in the tank. As you can see on the spray bar and HOB there is some algae in the tank but not enough that I have ever needed to do anything about it. Been really lucky with the balance in this tank, I probably only wipe the glass once a month and have never had to remove algae. This one is in the living room, the neighbours always assume I spend hours on it but I really don't.
Have you ever tried growing Pearl Weed? Its classed as a medium category plant but seen MD Fishtanks using it in abundance, just got a pot today and going to try and get it to convert to submersed form in a jar and if that works start using it in my tanks.