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Hello Koi Enthusiasts!
This blog is here to provide a spot for various things that do or might pertain to Koi. This stuff is intended for your entertainment, and is not meant to meet the stricter standards of our ebooks and courses, so use this info carefully and at your own risk. The short articles here may be descriptions of techniques that have proved effective, an introduction to new fish research, facts, graphs or just something FUN about fish! This information can be a springboard for your imagination and an entertaining place to learn something new. Information that was first published in Question of the Week can be found here.
The more we learn about Koi, the more FUN this hobby is - and we always say - if you're not havin' FUN, you're not doin' it right!
Carp have a preferred body temperature (PBT) of 22 to 28 degrees Celsius.
The swim-bladder, also known as an air bladder, is an air-filled sac situated just under the backbone at the top of the abdominal cavity.
Stress has such a huge impact on Koi that it warrants an article on its own. Good Koi husbandry will not be possible without a decent understanding of stress and the effects on koi in a pond. To fully understand stress it is necessary to backtrack a little bit and consider the immune or defence systems of fish.
Here is a very simple solution to a dry pond caused by a plumbing break.
If you are drawing water direct from your bottom drains.
Chlorine is a toxic element, and excess chlorine could be harmful to fish and crustaceans, so it is important to remove chlorine from the water before introducing the stock.
Methylene Blue comes as a very dark green powder, appearing blue when dissolved in water. Considered a 'traditional' medication for bacterial, fungal and parasitic infections, it is used less frequently as it is highly toxic to plants and will wipe out the bacteria in a biofilter.
Many Koi keepers look forward to spending some time either relaxing at home or going away for a well-deserved rest. Being a Koi keeper does not mean that you cannot go on holiday! If that was the case, many people will opt not to keep Koi.
The purpose of this article is to assist the Koi keeper during those stressful situations when a “dead” Koi is discovered in or outside a pond. Take heart, it may not be dead but indecision or a lack of knowledge may be the reason that it will soon be really dead.
Dr Paula Reynolds describes it very eloquently, in Koi-Carp Magazine, August 2000. "The outermost body protection for koi is the mucus coating which forms a layer known as the cuticle.
Most bacteria are less than 1mm in length. Therefore hundreds of thousands of bacteria can fit into a space the size of the full stop at the end of a sentence.
Chloramine-T (n-chloro-para-toluene sulfonamide sodium salt) like most other Koi medication that we use in bulk, is also used extensively for many other purposes.
Pollution of the aquatic environment by sodium fluoride from some industrial processes has been linked to delayed hatching of fish eggs and reduced growth, which is why, when I clean my teeth, I rinse my mouth into the sink, not my Koi pond.
Manufacturers of products such as these do not like to divulge their trade secrets, so it is difficult to determine the exact make-up without expensive laboratory analysis.
An interesting question has been asked: “If an air pump is turned off for an hour in the evening, does the dissolved oxygen in the pond water disappear immediately the air pump stops?” (The pond has an aerated bottom drain and I assume the air is being turned off so that the Koi can be seen more clearly).
The absolute minimum depth for a koi pond is generally accepted to be at least four feet deep over most of it’s floor area.
There are many different types of ready-made systems on sale, which are designed to simply and easily connect to your pond.
Conventional wisdom says that the turnover rate of a Koi pond should be at least once every hour.
I found this study while researching for an article on nutrition. This work was done in 2015, and specifies the number of times to feed per day, the amount and the protein levels for various stages of development in carp (they also cover catfish and prawns). In many parts of the world, carp is an extremely important protein source and they are thus raised commercially. As hobbyists, we can certainly learn a lot from these types of studies where the researchers want to understand how to maximize growth in an environment where there is little natural food in the pond.
This is an excellent study that evaluated changing out fish meal for plant proteins on carp (Cyprinus carpio) of various ages. The researchers evaluated growth rates using various proteins and various amounts of protein. Reading this will help you understand how to better evaluate the labels on Koi food bags.
Below is the text of a recent study that evaluated the use of Vitamin C to de-chlorinate water. They found it much cheaper and more effective than many other chemical solutions. This study was done for municipal water systems, but has direct benefits for Koi ponds as well! Full methodology, as well as recommended dosages are given. There are additional benefits to using Vitamin C as well.
!If you're not havin' FUN, you're not doin' it right