Drop checker + 4dKH ref

Performance & sizing

Core numbers for matching this unit to your tank and electrical plan.

Power

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Flow rate

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Noise

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Dimensions

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Price range

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Tank fit (L)

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Consumables & maintenance

Disposable cylinders and diffuser ceramics need refills or replacement on a usage basis; leak-check fittings when swapping bottles.

Description

A drop checker with 4 dKH reference solution provides a visual indication of CO2 concentration in planted aquariums. The color of the indicator fluid changes from blue (low CO2) through green (optimal) to yellow (excess). It is the standard tool for dialing in CO2 injection rates.