https://www.petsmart.com/learning-center/fish-care/koi-care-guide/A0017.html

Keep mature koi in an outdoor pond of at least 3 feet deep, with at least 50 ... An aquarium filter should be able to process all of the water in the tank 3 to 5 times ...

https://www.cuteness.com/article/keep-koi-fish-aquarium

Keep an aquarium cover on top of the tank at all times to prevent koi from jumping out. Use a cover with a light inside since koi also need 12 hours of light a day.

https://koistory.com/blog/guide-to-koi-fish-acquariums

Jun 17, 2013 ... You'll want to buy the biggest tank you can afford that will fit in your home so your koi have plenty of room. Keep in mind that large tanks are ...

https://www.youtube.com/watch?v=uBT4BOx0WLQ

Aug 16, 2014 ... This is Part One on information on trying to keep koi in fish tanks. Here we discuss the obstacles and issue of measuring size of koi among ...

https://pethelpful.com/fish-aquariums/Can-I-Keep-My-Koi-Fish-Inside

Nov 2, 2018 ... When keeping koi indoors is the better option; The reason why it's ... Even when purchased as a baby, it will outgrow its tank in about a year.

https://www.youtube.com/watch?v=tQte_8vmQJc

Oct 5, 2014 ... My tank and some thoughts on keeping koi in an aquarium.

https://www.youtube.com/watch?v=hDNbWOWOHrs

Apr 28, 2013 ... How to Keep Koi Fish | Aquarium Care ... Ep.2 Sweet Potato Betta Tank (New Wild Betta) - No filter, No CO2, NO ferts 4.5 Gallon Nano Tank ...

http://www.clarkekoi.com/how-to-make-a-koi-tank.html

Mar 28, 2012 ... Of course, because koi are so big, a large tank is required to house the fish ... This will keep it off the floor, insulate, and help balance the weight ...

https://www.petco.com/content/petco/PetcoStore/en_US/pet-services/resource-center/caresheets/goldfish-and-koi.html

Despite popular belief, goldfish do not ?grow to the size of their tank. ... Keep in an appropriate size aquarium or pond; Goldfish or Koi are not recommended for ...

https://animals.mom.me/how-to-care-for-koi-fish-in-an-aquarium-12264276.html

Sep 26, 2017 ... Keeping koi in an aquarium requires lots of space per fish, frequent cleaning ... of a small pond, a tank isn't a long-term housing solution for koi.