Tropica 1-2-Grow! Plants are very young plants cultivated in a labritory. The plants are guaranteed to be free from snails, algae and pesticides and are totally harmless to all sensitive shrimps and fish. Simply divide into small portions and plant leaving a small space between each portion. The plants are compact initially as they are young plants, but will quickly establish and flourish into dense and beauitiful growth, provided the aquarium conditions are optimum.