Dissolve oxygen ( O2) for gouramy.
As does other mortal, fish stand in need of oxygen for breathing in air and also process metabolism having an effect on to growth rate and [his/its] growth. less Oxygen content can cause fish of stres and facilitate disease attack fish. Obstetrical [of] dissolve oxygen equal to 7,8 ppm represent ideal content for the activity of energy kindness of gouramy.
source : R. Eko Prihartono, 2004.
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