Interpreting Water Tests for Ponds and Lakes
2015-8-27 · Single measurements of TDS above 1,000 mg/L could be indicative of a pond that has an existing water quality problem. pH. The pH of a pond or lake should generally fall between 6.0 and 9.0. Different types of fish tolerate different pH levels but, in general, most fish will do better in ponds with a pH near 7.0.
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