16C is just to low for arapaimas

[Eric A]

You could probably keep doing that. Watch the weather and put a heater if neccessary.

 

[ctoychik]

You could probably keep doing that. Watch the weather and put a heater if neccessary.

Now the weather is in high 30s and low 40s. I was unlucky i guess. If the winter was not so severe, then they would have grown some more and gotten used to slightly cooler water. Like i said before, i did not want to heat the pond in order to try to climatize them