. The complete aquarium book; the care and breeding of goldfish and tropical fishes. Aquariums; Goldfish. AQUARIUM MANAGEMENT 11. Fig. 6 Keystone Globe even for the small-sized goldfish. A twelve-inch globe, two-thirds filled, can be made into a fairly respectable aquarium, although all globes have the disadvantage of distorting the ap- pearance of the contents. To avoid cracking, the larger sizes should be set on a piece of thick felt or in a saucer of fine sand, so that the weight will be carried evenly. The more modern shapes of flat- tened and dish-shaped bowls are great improvements. The
. The complete aquarium book; the care and breeding of goldfish and tropical fishes. Aquariums; Goldfish. AQUARIUM MANAGEMENT 11. Fig. 6 Keystone Globe even for the small-sized goldfish. A twelve-inch globe, two-thirds filled, can be made into a fairly respectable aquarium, although all globes have the disadvantage of distorting the ap- pearance of the contents. To avoid cracking, the larger sizes should be set on a piece of thick felt or in a saucer of fine sand, so that the weight will be carried evenly. The more modern shapes of flat- tened and dish-shaped bowls are great improvements. The "keystone" shape shown in illustration is now made in the cheap globes, and when filled just to the widest point is a vast improvement over the old style. To Tell When Fishes Have Insufficient Air. It is when they rise to the top, "sucking bubbles" as some call it, or gasping. It is their way of panting for breath. It is wonderful indeed how the fish know that life- saving oxygen is at the surface of the water. Look at an overcrowded pail of minnows just freshly caught. Probably not in their whole lives have they ever needed to come to the surface for air, but the moment the neces- sity arises, each and every one that is able will hang to the surface for dear life. That is what the lady's goldfishes were doing when she felt they were trying to speak to her! When fishes are found trying to "speak" in this way, their owner should pay heed and act promptly. The condition sometimes arises from uneaten food which has started to decompose. Perhaps it is a dead fish or snail hidden in the grasses. If it is from food, the water is apt to be cloudy. If the water has turned bad it has to be changed. If the trouble is overcrowding, temporary relief can be had by a partial change of water and placing the aquarium in a cooler position. "How Often Must I Change the Water?" is truly the commonest question of the beginner. He seems to expect a reply such
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