Oxygen level a problem?

[Meyer Jordan]

Replace you Goldfish and Koi with a few of these.

https://www.nsf.gov/news/mmg/mmg_disp.jsp?med_id=132545

 

[MoonShadows]

Do these lungfish eat pond plants? LOL

 

[CometKeith]

It would seem pretty boring having to wait up to 4 years to get a little water to swim in, but they have been doing this for 400 million years? Wow!

 

[Lisak1]

What a weird creature!

 

[Faebinder]

I don't think they would like our winter.