enough aeration or oxygen in tank or pond

[batang_mcdo]

How do you determine if there is enough aeration in a tank or
Pond? I have an air disc and also a small falls for water return to my pond. Does it look like my pond is aerated enough? Ponds depth is 3 feet .
Also besides pH, ammonia, nitrite and nitrate , what else do you guys usually keep an eye in in the tank or pond?

what are the signs Rays show when they are not getting enough oxygen?
I've uploaded a video

 

[flyingsaucer owner]

I’d say it looks super aerated ??
Why are you concerned, is the water temperature very high?
The rays would become listless and show signs of heavy laboured breathing if the oxygen level was low.

 

[batang_mcdo]

I’d say it looks super aerated ??
Why are you concerned, is the water temperature very high?
The rays would become listless and show signs of heavy laboured breathing if the oxygen level was low.

Thanks Its not that warm at this time of the year, but I'm
A little worried as they are not as actice as when they were still in the tank. Also their appettite not as good.

 

[BIG-G]

I’ve never kept rays so I can’t speak to anything specific to them.
Just looking at the amount of air and the waterfall turbulence it looks like the oxygen content would be adequate.
If over heating is an issue you could add a chiller or some fans blowing across the water to help keep temperature down.

Beautiful rays and nice looking pond, by the way.