HagenKB

Continuous use of Nutrafin Natural Plant System

Since the Nutrafin Natural Plant System runs 24 hours a day will it cause an aquarium's PH level to crash at night?

Since the Nutrafin Natural Plant System runs 24 hours a day will it cause an aquarium's PH level to crash at night?
It would be highly unlikely that a pH crash would occur in an aquarium of recommended size overnight. The amount of CO2 generated based on the recommended aquarium size is less than maximum tolerable levels for most water conditions.

To be sure it is important to test the pH in the morning to see what the pH level is. If, by a very unlikely chance it is a little low, a small air pump can be operated by a timer to come on when the lights go off in the evening. The amount of air necessary for the type of installation that would usually employ a natural CO2 system would likely call for a small stream of air. Surface agitation and water movement will tend to drive CO2 from the water, so the air pump should only be considered when there is a definite crash seen overnight. It should not be run when daylight illumination is available. The acid build-up is due to the use of oxygen by the plants when they are not photosynthesizing from ambient light.

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