https://www.fishlore.com/aquariumfishforum/threads/koi-fish-in-an-aquarium.232456/

Koi fish in an aquarium 232456 - in Koi forum - So for a school project I have to raise koi. ... I have a 200 gallon pond that I plan to move them into, however I .... The pond is filtered by a large filter, that filters around 54 gpm.

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 gallons of water per fish.

https://www.youtube.com/watch?v=149jHwX4wgI

Sep 26, 2012 ... Feeding tips and hints on the specialised needs of koi fish. This tank is a large 7ft foot 260 gallon aquarium. SUBSCRIBE AND LIKE!!

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

Minimum Aquarium Size, 20+ gallons, depending on species ... Keep in an appropriate size aquarium or pond; Goldfish or Koi are not recommended for tropical ...

https://animals.mom.me/how-many-fish-should-be-in-a-55-gallon-tank-12361489.html

Sep 26, 2017 ... In order to create a healthy environment for your fish, add only 10 inches of fish ( so roughly two or three) and wait a month. Doing this creates ...

https://puregoldfish.com/tank-size/

Slim-bodies should only be kept in a pond .... (And then there's me, who has one fish in a 30 gallon tank all by herself who won't tolerate anyone else, so go figure. ..... goldfish and I was hoping to get 2, would 2 goldfish be ok in a 54 litre tank?

http://www.wetwebmedia.com/FWSubWebIndex/koiaqfs.htm

I have since put them into a 10 gallon aquarium until I get my pond designed and built here at the new house. I have not had good luck lately, in the past week 2 ...

https://www.amazon.com/Flexzion-Ultraviolet-Sterilizer-Equipment-1400-2600/dp/B01ELBL20U

Amazon.com : Flexzion Pond Pressure Bio Filter with Ultraviolet UV Sterilizer Light Bulb System Koi Fish Aquarium Tank Water Cleaning Supply Equipment 10000L (1400-2600 Gallons) : Pet Supplies. ... 5 star · 54% · 4 star · 11% · 3 star · 9% · 2 star · 9% · 1 star · 17% ...

http://www.firsttankguide.net/capacity.php

Jul 20, 2016 ... Determining the safe holding capacity of a home or office aquarium - how ... One inch of fish per gallon of water is a good rule of thumb for most small ... Piranhas, Koi, and African Cichlids), marine fish (like Blue Damsels, ...

http://blogs.thatpetplace.com/thatfishblog/2014/03/25/best-aquarium-filters-for-goldfish/

Mar 25, 2014 ... When fully-grown, your pet will need a 20 gallon aquarium in which .... As for goldfish disrupting the ecosystem – the pond I was referring to is a ...