194 GLAUCUS ; OR, 
is bare, you can see a sickly or dead inhabitant at 
once, and take him out (which you must do) instantly. 
Let your weeds stand quietly in the vase a day or 
two before you put in any live animals; and even 
then, do not put any in if the water does not appear 
perfectly clear: but lift out the weeds, and renew the 
water ere you replace them. 
This is Mr. Gosse’s method. But Mr. Lloyd, in 
his “Handbook to the Crystal Palace Aquarium,” 
advises that no weed should be put into the tank. 
“Tt is better,” he says, “to depend only on those 
which gradually and naturally appear on the rocks 
of the aquarium by the action of light, and which 
answer every chemical purpose.” I should advise 
anyone intending to set up an aquarium, however 
small, to study what Mr. Lloyd says on this matter 
in pp. 17—19, and also in page 30, of his pamphlet ; 
and also to go to the Crystal Palace Aquarium, and 
there see for himself the many beautiful species of 
sea-weeds which have appeared spontaneously in the 
tanks, from unsuspected spores floating in the sea- 
water. On the other hand, Mr. Lloyd lays much 
