2. the great circle of the earth that is equidistant from the North Pole and South Pole. 3. a circle separating a surface into two congruent parts. 4. celestial equator. [1350â1400; Middle English < Medieval Latin aequÄtor, Latin: equalizer (of day and night, as when the sun crosses the equator).
Commercial goldfish food -- available as flakes, pellets and granules -- contain all the nutrients goldfish need, and should form the major part of their diets. Overfeeding goldfish allows uneaten food to decay and contaminate aquarium water. Goldfish feces is another contaminant.
Goldfish live in many different temperatures. Anywhere from 50 degrees F to 68 degrees F is best, provided that any change in temperature is gradual. A rapid temperature change can make a fish more susceptible to disease, as can stress. Care on the keeper's part can reduce both.