What is the minimum growth of koi carps fish?

Siru S asked: if i kept 50 koi carp fry in only 250 gallon pond then how big they can be? i don’t want big/a foot long/huge koi. I like 4-5 inch koi. Because small koi looks more beautiful and also keeping big koi are unaffordable for me coz they need lots of food. So, [...]

frogs in my garden fish pond. how do i get rid of them without killing my koi fish?

Harri K asked: i have seen what i believe to be newly laid frog eggs(jelly-like clots with tiny black spots inside) hundreds of them. is there a way to destroy this jelly substance without killing my fish

What do you do with Koi fish in the winter in a cold climate?

Jeff D asked: I am thinking of making a Koi pond in my backyard but want to get some input first. What do you need to do for Koi fish in the winter?

I live in a area that can get to be as low as around 5 F but is usually mid 20s F. [...]

How long can Koi fish stay underwater in a pond without air?

Henry asked: I have a small pond in my yard with Kio fish inside. I went to work this morning and when I came back (~12 hours later) there was a sheet of ice over the pond. I was just able to poke some holes through the ice but how long can Koi fish stay [...]

Raised scales and inflated body in my Koi fish.What can I do?

remedioslabella asked: I have 9 Koi in an outside small pond.
I discovered one of them has raised scales and a very inflated body.
Is this contagious?
What can I do?