. The care of home aquaria. Aquariums. 44 NEW YORK AQUARIUM NATURE SERIES. SKA-LETTUCE (Ulva). It is the best aerator for the salt-water aquarium. The red-seaweeds add color and variety and sliould be placed at the bottom of the tank. ment already established. It will occasionally be necessary to add water to replace that which escapes by evaporation. This should be done a little at a time and care should be taken to have the temperature the same as that of the water in the tank. For the purpose of removing any deposits on the glass of the aquarium, a swab can be made out of a stick with a bit


. The care of home aquaria. Aquariums. 44 NEW YORK AQUARIUM NATURE SERIES. SKA-LETTUCE (Ulva). It is the best aerator for the salt-water aquarium. The red-seaweeds add color and variety and sliould be placed at the bottom of the tank. ment already established. It will occasionally be necessary to add water to replace that which escapes by evaporation. This should be done a little at a time and care should be taken to have the temperature the same as that of the water in the tank. For the purpose of removing any deposits on the glass of the aquarium, a swab can be made out of a stick with a bit of cheesecloth wrapped about the end. The cloth may be removed each time it is used, which should not be more often than is nec- essary to keep the glass reasonably clean, or if it is used again it should be carefully cleaned and sterilized each time in hot water. The swab will serve not only to remove ordinary dirt, but also the green scum of the minute plant life which in strong light will soon cover the glass. These minute plants do no harm—in fact they are as beneficial in yielding oxygen as are the larger ones— and they are a natural part of the balanced life of the aquarium. Plowever one keeps an aquarium to enjoy the view of its minia- ture water world, and if the green scum interferes with the view it may be removed without great detriment to the adjust- ment. The scum grows thickest on the side nearest the light and it may be allowed to develop on that side as it will serve to screen the strong light somewhat from the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Osburn, Raymond Carroll, 1872-. New York, The New York Zoological Society


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Keywords: ., bookcentury1900, bookdecade1910, booksubjectaquariu, bookyear1914