The toxicity of carbon dioxide is greater than 20 mg/L. True or False?

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Prepare for the Aquaculture Technician Certification Test. Study with flashcards and multiple choice questions, each question offering hints and explanations to ensure you are ready for your exam!

Multiple Choice

The toxicity of carbon dioxide is greater than 20 mg/L. True or False?

Explanation:
Dissolved carbon dioxide becomes harmful to aquatic life as its concentration rises into the tens of milligrams per liter. While sensitivity varies by species, temperature, pH, and exposure time, many fish and invertebrates show stress and toxicity symptoms once dissolved CO2 passes around 20 mg/L, with higher levels causing greater harm or mortality. So saying that CO2 toxicity is greater than 20 mg/L matches common aquaculture guidance. Remember that mg/L is a water concentration measure and actual risk also depends on pH, temperature, alkalinity, and duration of exposure, but the statement in question aligns with typical toxicity thresholds.

Dissolved carbon dioxide becomes harmful to aquatic life as its concentration rises into the tens of milligrams per liter. While sensitivity varies by species, temperature, pH, and exposure time, many fish and invertebrates show stress and toxicity symptoms once dissolved CO2 passes around 20 mg/L, with higher levels causing greater harm or mortality. So saying that CO2 toxicity is greater than 20 mg/L matches common aquaculture guidance. Remember that mg/L is a water concentration measure and actual risk also depends on pH, temperature, alkalinity, and duration of exposure, but the statement in question aligns with typical toxicity thresholds.

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