This is my stand of Rotala serpyllifolia. Originally collected in India by Christel Kasselmann and Karen Randall. Grown in a mineralized soil substrate supplemented regularly with Osmocote+ and Flourish Tabs. 75% RO water with the daily addition of the recommended dose of Flourish Advance with half dose of Flourish and a little bit of Flourish Iron. Co2 of at least 1.3 pH drop. Lighting is pretty intense using RapidLed fixture I built (24 LEDs in total). PAR of at least 150 at substrate, probably more.
It's a strong grower that doesn't like to be shaded. Red top to bottom. Like arcuata but a good bit larger and robust. Oddly susceptible to BBA, so regular water changes and filter cleanings are a must (50% weekly and every 3-4 weeks, respectively).
That's Rotala mexicana 'Wayanad' below it. Solid grower as well that always stays green. Very bushy and prolific. I think both will be popular.