Goldfish and Koi Care Sheet - Petco

Goldfish and Koi can grow quite large and their beauty is impressive
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What kind of food should they eat?
During the summer, when the water temperature is above 60 degrees Fahrenheit, feed your Koi fish a high protein Koi food. During the fall and spring, when the water temperature is between 52 and 60 degrees Fahrenheit, feed them an easy to digest wheat germ based Koi food. When the water is below 52 degrees, stop feeding your Koi.
There is a wide variety of Koi fish food available. How do you decide what to feed your precious Koi?
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The most common feeding mistake is overfeeding. This is because the feeding process is arguably the most fun you can have with your fish. At feeding time, koi come up to eat so you can see them and interact with them. Anyone with a maternal instinct will be thrilled to watch their favorite fish engulf food with such koi-ish zeal.

Overfeeding occurs anytime the fish are eating more than they need. This can make your fish sick, and excessive amounts of waste that strains the limits of what can be biologically reduced, results in a decline of water quality. Fish that are overfed in typical ornamental pond facilities will eventually develop large bellies and begin to look a little bit like tadpoles, with the big body and the wispy tail. That will not usually kill the fish, but the impact on the liver and other internal organs can and will be severe. So How Much is Just Right?

Fish should be fed no more than three times per day. In cooler water (65-70) they should only be fed once per day, if that. In much warmer water (76-82), three times per day is not "crazy,"' however, you have to be wary of bacterial blooms (cloudy water and low oxygen levels) if you feed heavy and there's a lot of waste.

Fish should be fed for about five minutes per feeding. If they don't come up and eat voraciously, they are telling you that they are too cold, too warm or, for some other reason, are not hungry. So feed light. If they are eating like crazy, you can sprinkle food on the water for five minutes as long as there are fish there to carry it off and eat it. Pretend it's a game – never feed so much that there is excess food left to float into the skimmer or filter. Koi Fish Feeding - How much to feed, best times for Koi feeding, what to feed Koi and the combinations of foods essential for healthy and colorful Koi.
Photo provided by FlickrAug 20, 2015 - What is the evolutionary advantage of a couple of black swans feeding their food to hungry koi fish
Photo provided by FlickrAug 29, 2012 - Many people ask what type of food, frequency and water temperatures to use when feeding their Koi and Gold Fish
Photo provided by Flickr
In unheated ponds, what and how much you feed koi is temperaturedependent. Start in spring, when the water reaches 50 degrees plus, startfeeding with small amounts of easily digestible, sinking wheat germpellets. As the water warms further, move to higher protein floating foodsand then when the pond begins to cool down again in autumn, revert to wheatgerm before ceasing feeding altogether. By then the fish’s metabolism willhave slowed and they will use their stored energy reserves through thewinter. In heated ponds, koi can be grown on more quickly with no checksas they can be fed right through the year. — What would Darwin say? What is the evolutionary advantage of a couple of black swans feeding their food to hungry koi fish? Or are there more powerful forces at work in the world than evolutionary advantage? Love or compassion for your fellow creatures for instance? Take a look at the video below, and tell us what you think is happening.

I've heard that grapes can contain some oxalates and that apple seeds contain cyanide. The math on these says that if you got a koi to eat a cubic meter of grapes or appleseeds in a day's time, said koi could perish from the crystallization of the oxalates in his kidney. For your information, a koi that could eat a cubic meter of grapes in a day would measure about forty-two feet long and weigh in at 2,300 pounds. So my advice on koi treats is, "If you would eat it, and the fish can eat it without it dissolving in, or polluting the pond, try it, and see if they like it. Don't feed any treat so much as to replace their interest in nutritionally complete staple food."


Well, what discussion of koi nutrition would be complete unless we talked about the koi's more jocular habits of eating fry, frogs and each other? More fantastic than fact, here are some things you might not know. Large Koi and large frogs In the spring you can hear spring peepers in your pond and low areas of your yard or the woods. In the cold months of spring they spawn and lay strands of eggs. And sometimes, they get in your pond, and a big koi catches one. Or, like at my house, all the koi catch one. And so you get up in the morning and one of your koi has a pair of frog legs sticking out of its mouths and they like the taste pretty good, but they can't work it down. So they swim around with the frogs in their mouths like pacifiers. Some of the largest fish can get the frogs down, some eventually spit them out and you have to net them out or they will decay and make a mess.


Finally, you should know this about baby koi. A momma koi will lay many tens of thousands of eggs per spawn. And her babies will be very numerous. And these fry mature at differing rates. The brown solid-colored babies will mature faster than the bright solid-colored fish and these babies will mature more quickly than any two or three colored fish. So it happens that often you see several much-larger baby fish in a spawn swimming about with a tiny sibling tail in its mouth. These cannibals eat prodigiously and the more they eat the bigger they get and the faster they get there. So breeders know to remove these cannibals. If you don't you will have a nice collection of Ogons and no multicolored fish in a spawn. So koi can be cannibalistic when they're fry. Later in life, it would be exceedingly rare to see a large koi eat a small one.Springtime feeding is very different from summer feeding routine and fish will tend to not take as much food at the beginning of the season so try not to offer them a lot of food just because it was a long winter. Regular feedings of low temperature spring mix pond fish food should start to be offered when water temperatures rise to 55F/13C and stabilize there. Let your fish tell you how much they want to eat by really watching them closely and learning their feeding behavior. A great skill to have as a pond keeper is the art of knowing how much to feed your fish and at what times of year you need to adjust your feeding routine. A little secret is to let your fish tell you when they are done eating. When your fish start nosing their food or just showing a “bored” interest in the food then it is time to stop, there is no mistaking when the koi and pond fish are being ravenous but it can be a little hard to tell when they stop eating so watch closely.