What are pond water are leeches tolorant to?

Leeches are typically tolerant to a range of environmental conditions found in pond water, including variations in temperature, pH, and dissolved oxygen levels. They can thrive in both freshwater and slightly brackish environments, often preferring stagnant or slow-moving waters rich in organic matter. Additionally, leeches can endure low oxygen conditions, allowing them to inhabit areas where other aquatic life might struggle.