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www.quora.com/How-big-do-koi-fish-grow-and-how-long-does-it-take

Most koi will achieve 24-26 inches. Koi can be stunted during the first 18 months of growth, but if it is from good stock they can later still grow to 20″. There are tosia and what some call jumbo tosai. A tosai is basically a first year koi. Fing...

www.koiacres.com/koi/faq.html

When the water is below 52 degrees, stop feeding your Koi. How big do Koi get? Most domestic Koi usually grow about 12 to 15 inches long. Japanese Koi usually grow 22 to 26 inches in long. Jumbo sized Koi grow up to 34 to 36 inches long. Does the size of the pond hinder a Koi's growth? The size of a pond will not stop a Koi from growing.

www.clarkekoi.com/growing-your-koi.html

the keys to growing big koi #1 - Genetics Genetics are predetermined physical traits expressed as a phenotype. If a fish does not possess the bloodline to develop into a large specimen, it simply will not despite the keepers diligence. The goal is of course for every fish to reach that size limitation.

www.answers.com/Q/How_big_do_koi_get

How big do koi get? Koi can reach a maximum of around four feet or 1.2 metres. At this size the fish may weigh 90lbs or approximately 40kg but this is unusualy large for a Koi.

answers.yahoo.com/question/index?qid=20100227170352AA8yLKC

Best Answer: Yes, they do in fact grow very large and they really are best for large ponds. The average adult size of a Koi is approximately 2 and a half to 3 feet. However, they can get larger than that. You may want to consider doubling your filtration or even tripling it considering Koi are massive waste ...

www.aquascapeaddiction.com/articles/how-big-can-koi-fish-get

If you have questions around Koi fish growth then this article has the answers, we look at how big do koi fish actually get and how to maximize growth the right way. Koi fish are definitely some of the coolest fish that you can get for a backyard pond. They may not be the easiest to care for, and they certainly are not cheap, but they are well ...

www.rocketswag.com/animal/fish/freshwater-fish/koi/How-Big-Do-Koi-Get.html

How Big Do Koi Get ? Koi fish have the capability of growing to a huge size but not all of them can do so. The average size of a koi fish can be from 24 to 36 inches. A lot depends on the pond size, amount of water and its temperature and also the feeding techniques. Those who achieve a huge size are genetically strong to have attained such a size.

www.youtube.com/watch?v=VR_m5qNQ7t0

These Koi are upto 30 years old, one died recently and weighted 17 lbs, it wasn't the biggest....

www.fishlore.com/aquariumfishforum/threads/koi-will-they-grow-to-the-size-of...

Koi: Will they grow to the size of the pond? 95515 - in Koi forum - Hi! Last summer my family built a small pond in our backyard. It's eighteen inches deep, by three feet across, by five feet long. (I...

www.aquascapeinc.com/water-gardening/fish/butterfly-koi

You just don’t do this. Quite a few koi connoisseurs think of butterfly koi as “mutts,” and some say that butterfly koi aren’t even koi. Others, however, happen to think butterfly koi can be the finest koi in any collection, depending on several factors – size, pattern, and finnage. First, let’s consider where butterfly koi originated.