We can keep and enjoy Koi with any space even in an indoor aquarium. In Japan, the JNPA (Japan Nishikigoi Promotion Association) promotes keeping Koi in an aquarium. So you no longer have to give up enjoying Koi because you live in an apartment or because you lack backyard space to build a pond. Learn our best tips for aquarium koi keeping success!
In this article we cover the following on koi fish in aquariums:
5 Benefits of Raising Koi in Aquarium Tank
You may assume that koi are meant for backyard ponds, but in fact there are several advantages to why you may choose to set up an aquarium indoors vs. in the backyard. For those who live in apartments, this might be your only option to raise our koi fish for sale. Study our tips and enjoy the hobby!
Contact us or comment below with your experiences and any questions we have not yet answered.
1. Koi are easy to keep, and an aquarium takes up little space.
Koi adapt to their environment and grow according to their space. So they will not outgrow the aquarium nor jump out. Koi are also strong. Unless there is a drastic change of environment, Koi can live in water temperatures of 40–95 F°. They also can easily survive for a week without food (if you have to go on vacation, for example).
2. You can enjoy Koi every day regardless of the season.
Koi are cold blooded fish. So when winter comes, outdoor Koi go dormant; but because water temperatures indoors are stable, indoor Koi stay active. You can feed them every day and be with them every day throughout the year.
3. Koi are friendly and can eat from your hands.
Koi are known as friendly fish. Once they get comfortable with their new home, they could eat food from your hands. They can be your perfect indoor companion.
4. A Koi aquarium is a perfect room feature.
Koi are known as living jewels; and with over 100 different varieties of koi, none are exactly the same. An aquarium of colorful Koi will be an eye-catching focal point for any room.
5. Koi fish aquariums relieve stress.
It is also known as aquarium therapy. Aquariums are known to lower a person’s blood pressure and heart rate.
What You Need to Start a Koi Fish Aquarium
The following items will help you on your way to setting up an aquarium. None of this is specific for koi and the main adaptation to fish keeping is the amount of koi you keep in the tank. These are common items to use for your aquarium management.
How Many Koi Can Be Kept In An Aquarium?
There is no specific number of Koi for aquarium; but here’s a general rule of thumb for your reference:Aquarium SizeNumber of Koi (4-6 in. long)Number of Koi (6-8 in. long)15–20 gal.6340 gal.157
Preparing Aquarium for First Time You Receive Koi
IMPORTANT – Ensure these three things are taken care of when bringing in new Koi:
1. Finding a location
2. Preparing the aquarium water
3. Acclimating the Koi
How to Maintain a Healthy Koi Aquarium
In a nutshell, avoid overfeeding, overcrowding, and cleaning or changing water too often.
It is important to feed properly. We recommend you also read our guide on how to feed koi.
Here’s how often to feed koi in aquarium:
Water Maintenance Guidelines
Clean the aquarium once every 2–4 weeks. There is no need to take your Koi out.
Here’s how to do your water cleaning:
Aquarium Koi Photo Gallery
Buy and Start Your Koi Fish Aquarium
Small, young Koi are great for starting your Koi aquarium, because their smaller size is easier to manage for aquarium’s limited space. Send us a koi request for the type of koi you are looking for and we’ll find the right size to fit your aquarium.
Do koi need an air pump?
A pond air pump such as the Aquascape Pond Air 20, is a must for every backyard koi pond fish keeper! A pond air pump can also be used during the winter months for those that turn off the main waterfall pump in areas where winters are more harsh.
How much oxygen do koi need?
The minimum level of oxygen in a koi pond is 8 ppm. Temporary minor fluctuations below this should cause few problems providing other water quality parameters (pH, Ammonia and Nitrite) are acceptable. However a permanent value below 8 ppm is destined to cause koi health problems.
How long can koi fish live without a filter?
A fish live without a filter for a maximum of seven days and a minimum of three days. A filter helps clean the water over and over again, so the toxins in it don't settle down.
How often should I change the water in my koi pond?
If you are looking to raise your koi and keep them healthy, you should consider performing at least a 10% to 20% water change each week if possible. If your goal is to raise your koi to their full potential, both in color and size, you might want to consider performing even more substantial water changes.