

CO2
JARDLI Glass CO2 Drop Checker
by JARDLI
Glass indicator filled with 4 dKH reference solution and bromothymol blue reagent. Changes color from blue (low CO2) to green (optimal) to yellow (too high). Comes with pre-made solution. The most popular branded drop checker on Amazon. Mount it across the tank from the diffuser for an accurate reading.
CO2JARDLIdrop checkerindicatorplanted tankmonitoring
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