What type of plant is this?

[Sprinkle]

I agree with dougall, a rotala, probably indica. I had it grow well but not out of control with medium(ish) light, no co2 & mostly just fish poo as ferts. 1 of the easier stems, the tops look better near the lights, just trim & replant the prettier new growth as needed.

i did that. bottom of my herb, bacopa, melted and i cut it and replanted the nice top