TROPICAL AQUARIUxM FISHES 



63 



daphnia eggs would be carried away and consequently it would take longer 

 in the spring to develop a stock large enough for practical use. If possi- 

 ble it is a good plan to have two or more daphnia ponds, so that one may be 



Fig. 49. Farm Breeding Ponds, Showing Detail of Sluice and Guard 



replenished while the other is being drawn from. The bottom of daphnia 

 pools should be prepared with a substantial layer of dead leaves and 

 manure of any kind. Later in the season when this has all disintegrated, 

 a new supply should be occasionally added. Any decomposing vegetal 

 or animal substances will do. If a prowling cat has met accidental death 

 by shooting, its carcass placed in the daphnia pond will give quite an im- 



