Even pond grade koi get big if cared for properly.Yeah about 790 gal.
But it's not expensive jumbo size koi. Will it(decent grade butterfly koi) be that bulky? How long does it take for Koi to get 35"
2 kois maybe isn't enough mess for those discus to lay eggs. And sometimes one Koi will just lay there for discus Juv to clean his body.
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The Barb did disturb them more so I already take them out.
My mutty girl was 21” and 4yrs old when she passed this last winter. And she was stunted for sure from me not having an appropriate size pond from the start.
She as very bulky and heavy. Had to be over 5lbs she was heavy to net out.
Butterfly koi get just as big too.
This boy was under 2yrs old and 16”