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it can be that the PH is basic or starts to be acidic PH because is under alkali PH value. pH is measured on a scale that ranges from 0 (strongly acidic) to 14 (strongly basic). In the middle is 7, where the pH is "neutral" (like in pure water).

freshwater of lakes has a PH between 6 and 8 now alkali PH is pH greater than 7.0. When the pH of freshwater becomes highly alkaline (like 9.6), fish start to die.

pH approaches 5 and goes below 5 then non-desirable species of plankton and mosses may begin to invade the water and fish start to disappear untill water is essentially devoid of fish.

Perch can survive as long as the pH does not fall below 4.6 or exceed 9.5.

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11y ago

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