If I have insufficient airation (too small an air stone) in my pond could it be that everything will survive but only barely and therefore the fish and frogs will have brain damage?


If a pond of 20 frogs has say 4 die for lack of oxygen, it would seem that until those 4 weakest links, unfit died, they were compromising the amount of availible oxygen to the other frogs and until the ballance was achieved, the other frogs will have had an insufficient amount of oxygen.


I'm concerned that even though nearly everything survives, I will not know if they suffered from effects other then loss of life - i.e. loss of brain cells in great number and an inability to produce viable young, etc.

Anything is possible! Don't worry too much!

I haven't seen frogs acting brain damaged. They're either dead or they're not. I'm not sure what your second paragraph means. Dead frogs decomposing in a pond does use oxygen so remove any that you find.