yes, exactly. high temp means low dissolved oxygen and any kind of algae OR mulm on
the bottom means oxygen getting sucked out at night. even a couple airstones in one
area and the fish will find the area. Ingrid

"Hank" wrote:
Even with 4,500 gals., if the water temp. is high and you have a lot
of plants I would run a couple of air stone just as cheap insurance.
(especially at night when plants draw oxygen)


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