Here are some answers to the most typical questions we get from our customers. For more details, and an on-going Q and A, visit The Funky Koi Facebook page, and look under “Notes”.
Why would you choose our store?
Koi are ornamental carp. They were introduced from China to Japan, and bred as early as the 17th century. They are a beautiful and very hardy fish and can withstand extremes of temperature, pH, etc. This makes them ideal for backyard water gardens.
If Japanese Koi live a stress- and predator-free life, they may outlive their owners. Expected life spans for various koi species range from 25 to 200 years. A Koi that is well cared for in a small pond in someone's backyard may live 20-30 years.
Rule of thumb: Koi need 10 gallons of water for every inch of fish. A full-grown 36” fish will need 360 gallons of water. Ten fish at 36” will need 3,600 gallons, not including plant or other aquatic life. Be careful not to overstock your pond; let your fish enjoy their spacious living, because they will grow into their pond and they will be healthier for their long life. Click here for pond volume calculator.
According to some Japanese koi experts, the pond should be 3 times as deep as the length of the longest fish. So, if your longest fish is 12”, your pond should be 3 X 12 = 36” deep.
Our pond is about 4 feet at its lowest point. We have an air pump at the deep end and the aeration keeps a hole in the ice all winter. This is important as gases need to escape and koi like to see 'light'. Koi will hang out in deeper water as the air and water temperature drops. So far this has been a good depth for our Massachusetts pond. Our largest koi is about 16" long.
See our selection of Heaters (for winter) and Air Pumps (year round).
As a rule, feed your fish as much as they can eat in 10 minutes when the water temperature is consistently at or over 50° F. Use spring (low protein food) in early spring and fall. When the water temperature reaches 60° F, feed low protein food twice per day. As the water temperature increases (between 70-90° F) feed your Koi good quality protein pellets twice per day. Stop feeding when the water temperature falls to 47° F or less and rises over 90° F. Always remove unused food to prevent excess nutrients in your pond.
The term “pH” applies to your pond water. It means “Potential of Hydrogen”. A pH of 7 is neutral, meaning there is a balance between acid and alkalinity. A pH measurement below 7 means acid is present; a measurement above 7 is basic (or alkaline).
A pH of 7.5 is ideal for koi. They can survive and thrive at stable levels between 6.8 to 8.2, and pH values should be kept consistent throughout a 24-hour period to keep your koi happy.
Here’s a great link to help you understand what pH is (acid / base): http://www.worsleyschool.net/science/files/pH/page.html
We have pH meters to monitor your pH, as well as a line of supplies to help you adjust your pH.
Ammonia comes from the fish gills, their waste, decaying food and decaying plants. If there is too much ammonia in the water, it will irritate (burn) the fish gills, which can stress and kill them. If your fish are jumping out of the pond, always suspect they are trying to escape a poor environment (e.g. ammonia, pH extremes).
Some ways to reduce ammonia are:
See line of air pumps, testers, and beneficial bacteria to help keep your water pristine and your koi healthy!
Page Revision Date: May 17, 2011