Dissolved oxygen

Oxygen saturation is a relative measure of the concentration of oxygen that is dissolved or carried in a given medium as a proportion of the maximal concentration that can be dissolved in that medium at the given temperature. It can be measured with a dissolved oxygen probe such as an oxygen sensor or an optode in liquid media, usually water. The standard unit of oxygen saturation is percent (%).

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 4.0

PONDPOISE

Goldfish, koi & the calm of a well-kept pond — stocking, filtration, and care.

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