IN SHORT 263 



Don't use running. water. Balance the aquarivim with growing plants 



instead. 

 Don't overwork the aquarium hobby. It will last longer in 



moderation. 

 Don't neglect an opportunity to feed the fishes on chopped or small 



earthworms. 

 Don't allow unconsumed food to remain in the aquarium. Remove 



with dip-tube. 

 Don't use unmixed raw water from the faucet. The excess of oxygen 



is undesirable. 

 Don't be stingy, but give away a few interesting fishes to those who 



might become fanciers. 

 Don't tear up the plants in trying to catch a fish. A little patience 



will avoid later regrets. 

 Don't fail to thoroughly disinfect an aquarium in which there has 



been a contagious disease. 

 Don't suppose that a few plants can do much water-purifying. A 



liberal number is required. 

 Don't place daphnia in the aquarium without first looking carefully 



among them for insect enemies. 

 Don't throw away dead rare fishes. Preserve in alcohol. Scientific 



institutions are glad to have them. 

 Don't keep goldfishes and tropicals together. They may not quar- 

 rel, but the appearance is not good. 

 Don't worry about a slight leak in an aquarium. Probably some 



muddy water will stop it in a few days. 

 Don't, as a beginner, purchase goldfish with very long fin develop- 

 ment. They are usually past their prime. 

 Don't place new fishes with yours until certain that they are not 



diseased. A week's quarantine is desirable. 

 Don't attempt to grow aquatic plants in a very subdued light. They 



cannot prosper, and do more harm than good. 

 Don't always use chemicals on a fish a little out of condition. 



A change of aquarium or of food may be all that is necessary. 

 Don't overlook the great possibilities of the native fish aquarium, 



both freshwater and marine. The terrarium, too, is well 



worthy of attention. 

 Don't keep fishes in galvanized iron or zinc receptacles, nor have 



copper or brass in contact with aquarium water. Unseasoned 



wood is bad ; unseasoned concrete, fatal. 



