ISTA - CO2 Indicator…


ISTA – CO2 Indicator Refill


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This refill is used in conjunction with the CO2 indicator from ISTA.

  • Simply refill the CO2 indicator cap with 1CC of the CO2 indicator refill, no water required.
  • Only refill once per month.
  • A refill is not required with every maintenance session of your aquarium.


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