High-quality glass CO2 drop checker with a suction cup.
By monitoring the CO2 concentration to let you know if the aquatic plants are photosynthesizing adequately. Or if you have fish in your tank, you can also use this product to monitor if your fish are lacking oxygen.
An essential piece for your planted tank or fish tank.
Note: Rinse the interior with mineral water and dry naturally. (Do not use tap water for cleaning.)
Quantity
Goes well with this item. Each is the same price as on its own page.



