ISTA CO2 Indicator Above 60cm Swirl the test vial for

Swirl the test vial for about 2 seconds after each droplet

It is regenerable over and over again for a minimum of 2 years in normal use

Nitrites are the most common killers of aquarium fish so they are the compounds to guard against in the nitrogen cycle

5 cmCUBE : allTUBE : allLIFE : from 30FLOW : allCLASSIC : from 30HALO : from 30

ISTA CO2 Indicator Above 60cm Swirl the test vial forCHARACTERISTICS: Allows you to monitor the CO2 level in your tank from any angle. Unique design prevents any chance of spilling the indicator solution. Reusable color chart sticker allows the constant repositioning of the position of the label on the aquarium.