eee 
98 THE MARINE AQUARIUM. 
growth on the side of the vessel, but a green stain per- 
vading the water, as if a green colouring matter had been 
dissolved in it. Mr. Gosse says, “ it is vegetable in its 
origin, and arises from an infinite number of the spores 
(or seeds) of green Alge dispersed through the fluid, 
and held in suspension there.” Mr. Gosse further says, 
“T know of no cure for this,’”’ but he quotes Mr. Lloyd’s 
experience as demonstrative of its curability by placing 
the water “in a dark closet for two or three weeks.” 
From the experience I have had in this matter, I have 
no hesitation in saying that the filter will be found an 
instantaneous remedy; the water need not be drawn off 
at all, but kept filtermg through charcoal by frequent 
filling of the filter from the surface. In May last, a tank 
of mine became suddenly opaque, though otherwise in 
excellent order. The collection was valuable, and a dis- 
turbance of it would have been attended with risk. I 
suspended an old flower-pot half filled with fresh charcoal 
and sea-side grit above it, and set the filter to work. 
As fast as the filter ran out, I filled it again from the tank, 
without disturbing anything, and a change for the better 
was perceptible in an hour. Two days after, the water 
was as bright as ever, and the stock in the finest possible 
condition, owing to the brisk eration they had gained 
by the experiment. 
Feeding.—Anemones generally do not require feeding, 
though the Daisy and the Dianthus will greedily partake of 
small fragments of oyster and minced mutton, and some 
other kinds will occasionally eat of the same food; but I 
cannot recommend the beginner to feed Anemones, for, in 
