all dead in one day.

[Tula]

Sorry to hear this.

 

[HARO]

All my water levels were perfect and my fish were healthy and plenty of oxygen. .

Just one question. How do you know there was plenty of oxygen?
John

 

[Lisak1]

Very sorry to hear this. I hope you don't give up. Learn and move forward. Maybe it's time for a bigger pond? Small ponds can be more difficult to manage that medium sized ones, in my opinion. Less room for error.

 

[Johnny d.]

Just one question. How do you know there was plenty of oxygen?
John

My filter has to exports pouring water back in from three feet high and I also have a fountain in the middle, all runs 24hrs a day.

 

[Mmathis]

My filter has to exports pouring water back in from three feet high and I also have a fountain in the middle, all runs 24hrs a day.

But warm water can't hold as much oxygen as cooler water -- can you say for sure without testing it?

 

[HARO]

The warmer water gets, the less oxygen it can hold. Just because you move it doesn't mean it contains oxygen.
John

 

[Mmathis]

The warmer water gets, the less oxygen it can hold. Just because you move it does't mean it contains oxygen.
John

That's why my goal was to cool the water via shade. I figured I could add air all day, but in my case at least, the water temp. was the issue. Thanks for clarifying that, John.

 

[Johnny d.]

[

But warm water can't hold as much oxygen as cooler water -- can you say for sure without testing it?

I belie
UOTE="Mmathis, post: 282692, member: 3238"]But warm water can't hold as much oxygen as cooler water -- can you say for sure without testing it?[/QUOTE]

But warm water can't hold as much oxygen as cooler water -- can you say for sure without testing it?

I believe I have plenty of oxygen but how do u test for oxygen in water??

 

[MitchM]

Johhny d, you can purchase a dissolved oxygen test kit the same as you can purchase other water quality test kits.
Here is one suggestion http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=16555

 

[Nepen]

So sorry to hear that. I had a problem with warm water too (large surface area to heat up my pond) and the tempt reached 91 F a couple of days (a month ago). I have not had any casualty. I added water hyacinth and water lily to try to shade the pond, it seems to work as I see the fish are more active and water's not warm to the touch anymore. Also, I have air pump going all day.

 

[Mmathis]

How often should to test for DO?

 

[MitchM]

How often should to test for DO?

If you are concerned or curious or have fish gasping at the surface, it would be interesting to test.
Otherwise, no test.

Keep your pond within reasonable stocking levels, not a lot of organic decomposition and with good water circulation, your pond will be fine.
It will never do any harm to add an airstone. Your fish and bacteria will thank you.