Hygrophila polysperma Sunset. This easy growing stem plant displays striking bright white to pink veins on pointed pink to reddish leaves in ideal conditions. With regular trimming and replanting of tops, stunning bushes of colour can be created in your aquarium mid-ground. Hygrophila polysperma is tolerant of most aquarium conditions, requiring only moderate lighting and fertilisation for basic growth, or intense lighting, fertilisation and CO2 injection for best colouration and results.