As we shall see in Chapter VII,the fact that the movements of the water in aeration are produced by air bubbles is usually of little consequence, and it is an example of get- ting the right result for the wrong reason. The old idea behind aeration was, of course, to increase the contact of air and water by sending fine bubbles coursing up through the tank. Unless a very brisk spray of very fine bubbles is used, however, the surface of water exposed to air in the bubbles is small and unimportant, and the movement caused at the tank surface is what matters.
Thus, we compute fish capacity from surface area, and we may modify this by including the effects of temperature, water movement, and various other factors. The warmer the water, the lower the solubility of oxygen, and thus the lower the fish capacity. The following estimates assume an average temperature of about 75°F. for tropicals and about 60°F. for cold-water fishes.
Aquarium Fish Information Here…
Aquarium Supply
