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Re: [APD] aeration & a planted tank

> Pearling is a sign of O2 saturation.

Yes, it is.  And your point is?  :-)

I guess I wasn't clear - the pearling occurs in the evening.  In the
morning, when the O2 is low, there's no pearling.  Only fish 'gasping' at
the surface.  It would appear to me that the oxygen is being depleted at
night by the rapid plant growth.  No?

Terry in AZ

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