330 Fresh Water Aquarium 



the plants. To cure the fishes the aquarium 

 may be temporarily exposed to the sun, or 

 where this is not practicable, luke warm 

 water may be gradually added until the tem- 

 perature is again brought up to the normal 

 point, between 26 to 30 Centigrade, which 

 is equal to 79 ° to 86° Fahrenheit. 



Careless feeding, or feeding with unsuit- 

 able preparations, frequently cause dis- 

 turbances in the digestive organs of the fish, 

 in that they cause either too watery excre- 

 ments or pronounced cases of constipation. 

 Both can easily be diagnosed by careful ob- 

 servation. While in the first case the fish 

 may continue to take food readily, it may 

 refuse to do so in the case of constipation, 

 taking it very sparingly. It will appear un- 

 naturally distended and give off very com- 

 pact excrements under great difficulties, 

 The replacing of the formerly used food by 

 one of the standard food preparations will 

 frequently help the fishes but it usually 

 takes some time to effect a perfect cure. 



