CourtneyandThunder 131 Posted June 4, 2015 Can you keep them in a 75 gallon forever, if so how many???? 0 Quote Share this post Link to post Share on other sites
shakaho 6,312 Posted June 4, 2015 Koi reach approximately 10 times the size (mass, not length) of goldfish. The standard recommendation for pet koi is at least 250 gallons per koi with a minimum pond size of 1000 gallons. In other words a 1000 gallon pond is adequate for 1-4 koi provided you have adequate filtration and water changes. People who keep fine koi for breeding or showing typically use 1000-2000 gallons per fish. 0 Quote Share this post Link to post Share on other sites
DieselPlower 2,123 Posted June 4, 2015 In general, no. 0 Quote Share this post Link to post Share on other sites
CourtneyandThunder 131 Posted June 4, 2015 Oh wow, okay glad I asked. They get massive. They are just such beautiful fish. Wish I could keep them, may be I will get a pond one day. 0 Quote Share this post Link to post Share on other sites
GoldenSpoiledRotten 6,786 Posted June 4, 2015 0 Quote Share this post Link to post Share on other sites
Niki 203 Posted June 4, 2015 Holy, those suckers are huge, how old do you think some of them big boys are? 0 Quote Share this post Link to post Share on other sites
GoldenSpoiledRotten 6,786 Posted June 5, 2015 It's hard to tell. Koi do their best and fastest growing in the first 2-3 years of life, a lot like goldfish, but they still grow their whole lives. 0 Quote Share this post Link to post Share on other sites
DieselPlower 2,123 Posted June 5, 2015 (edited) Giant show Koi are often less than 5 years old. Their color begins to fade as they age. A 10 year old koi is nearly full grown. Edited June 5, 2015 by DieselPlower 0 Quote Share this post Link to post Share on other sites
CourtneyandThunder 131 Posted June 5, 2015 Wow they are massive, beautiful fish. Maybe I will have a pond one day. 0 Quote Share this post Link to post Share on other sites
koko 14,341 Posted June 5, 2015 In general, no. DP short and to the point 0 Quote Share this post Link to post Share on other sites
