SCIENCE
ENVIRONMENTAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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pH
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Gravity
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Atmospheric pressure
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Temperature
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Detailed explanation-1: -Discus fish are notoriously sensitive to elevated pH levels in the aquarium. They need very soft water and pH ranging from 5.0 to 6.5. Plecostomus species can tolerate a fairly wide range of pH, but they like it on the acidic side, from 5.0 to 7.0.
Detailed explanation-2: -Although many fish can tolerate pH in the range of 6.5 to 8, each species of fish has an optimal pH range for growth and reproduction. Every attempt should be made to keep pH within the fish’s optimal range.
Detailed explanation-3: -Rainbow Trout are more sensitive than other salmonids to very high or low pH levels, especially acidic conditions. A pH range of 6.5 to 8.0 is considered optimal and adults can tolerate levels from 5.5 to 9.0. Natural reproduction is not successful in waters with pH less than 6.
Detailed explanation-4: -Salmon prefer pH values that are circumneutral (6.5-7.5), rather than acidic (<6.5).