Ista All Angle CO2 Indicator

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CO2 Indicator - All Angle View This CO2 Indicator features an All Angle View so you can regularly and accurately monitor the CO2 level in your aquarium, from any angle! With the re usable color chart sticker, you will quickly be able to know if the carbon dioxide level in your aquarium is at the appropriate level. Most importantly, this Indicator is built with a smart design, to ensure no solution spills into your pets home! 1.5" x 1" x 1.75" Show more