Old 05-30-10, 05:46 AM
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Join Date: May 2010
Location: united states
Posts: 1

I have an 8' by 8' above ground water garden that is about 24" deep. The problem I have is in early summer. There are quite a few water lilies and some other pond plants in this garden along with about 30 2" goldfish; born in this watergarden 2 summers ago. The problem is that at this time of year they come to the surface and suck air. I have a small pump that recirculates the water but had to add another with a small fountain on it. This seems to have solved the problem but what is causing this?
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Old 05-31-10, 04:29 AM
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Join Date: Mar 2003
Location: NC, USA
Posts: 17,603
Sounds like not enough oxygen in the water. The problem is worst at dawn since the plants have not been producing oxygen during the night and have been consuming it from the water. The problem is also worse as the water warms (warm water can hold less oxygen). You can add more aeration and reduce the number of fish.

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