WATEB-PLANTS. 



85 



sum ranging from Is. 6d. to 3s. It should be planted in a 

 pot containing loam and silver sand mixed. It is a rapid 

 grower and a useful and ornamental plant for the tank. I 

 have found that it will not flower well unless it can have as 



Fig. 61. Broad-leaved Pond-weed (Potamogeton natans). 



much sunlight as is compatible with the welfare of the rest 

 of the aquarium. 



The Water Chestnut {Trapa natans) (Fig. 66), though not a 

 native of England, is a great favourite with some aquarium- 



