Under water Hygrophila corymbosa ''angustifolia'' has relatively narrow leaves which are grouped close together. Plants sold in the shops are normally cultivated above water, and have rounder leaves with larger gaps between them. [TROPICA]
Being the hygrophila enthusiast that I am, it came as no surprise that I decided to give this one a try. This species is relatively undemanding in terms of care like the majority of hygrophila species. I keep mine in a 1.8 wpg tank with fluorite substrate and weekly fertilizers and it's doing well. I see new leaflets sprouting from the stems almost everyday.
Very easy plant, I got it less than a week ago and it's already grown a couple of inches, I have it in Eco-Complete substrate with around 2 watts per gallon, doing homemade CO2 injection as well as flourish excel. It's doing great, I may add an image later.