My aquariums (a 20 gallon and a 5 gallon) produce excess RRF every week. I harvest a handful on Wednesdays.
I have one aquarium with snails and one without. You can request "pest-free" if the possibility of snails bugs you. You can HAVE some of my snails if the possibility of snails elates you. The world is your oyster.
They get ~8 hours of light and they're very easy plants if you're new to putting real flora in your aquariums.