86 



ftquatir lixit 



such should be taken out pronto, lest the 

 infection be contagious. Once a month, 

 with a rubber hose, syphon out a bucket 

 of water and replace with new water of 

 the same temperature. Through the 

 winter endeavor to keep the tank at a 

 temperature between 55 and 60 degrees 

 Fahrenheit ; in summer take what comes, 

 though you must avoid, as before recom- 

 mended, the direct sunlight that will dur- 

 ing the day raise the temperature to a 



ternal. Some are curable and others not. 

 A few have obvious symptoms that are 

 readily recognized, while internal afflic- 

 tions cannot be diagnosed except by a 

 post-mortem examination by an experi- 

 enced anatomist and bacteriologist. 



Most investigations of fish diseases 

 have concerned the food and game spe- 

 cies, their economic value justifying the 

 great expenditure of time and money. 

 Much has been accomplished, but much 



The European Weatkerfish, Cobitis, is a Useful Scavenger 



point causing discomfort if the tank be 

 small. 



Few exceptions will be found to my 

 remarks, and, in general, let the aqua- 

 rium "mind its own business," and only 

 offer assistance when it seems to need 

 help to preserve peace and health ; even 

 neglect cleaning and all else but feeding, 

 unless the tank is becoming unsightly and 

 needs "brushing up." 



The fish is a complex organism and is 

 subject to a wide array of diseases, para- 

 sitic and non-parasitic, internal and ex- 



still remains to be done. The efforts of 

 the laboratory of the Regenia Chemical 

 Company, however, have been exerted in 

 the interest of the aquarium fish, with the 

 result that "Violet Ray" is now the stand- 

 ard remedy of the aquarist, having super- 

 ceded the salt bath and other simple nos- 

 trums. 



As a pure breed the Fantail goldfish 

 has long been extinct, having been merged 

 by cross-breeding into the fringetail form. 

 Fantail is the popular lay term for dou- 

 ble-tailed fish generally, and as such is 

 used in dealers' price lists. 



