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Cal Aqua Labs' Double Check series is the only all-glass dual-compartment CO2 checker that allows the user to accurately compare the CO2 level in your aquarium side-by-side against a standard reference. The top chamber holds the CO2 indicator solution, the bottom chamber holds a CO2 reference solution. The reference solution color corresponds to 30 ppm of CO2 - a level that is widely accepted for good plant growth in most aquariums.
This innovative drop checker is designed to be efficient and accurate, implementing a simple visual comparison of the CO2 level in one's aquarium with an optimal CO2 level, indicated by the standard reference solution. The Double Check drop checker eliminates the guesswork normally involved in determining which shade of green is considered optimal, and reduces the need for color comparison references. The precise and prime CO2 level is achieved when the colors in the two compartments are identical.
The Double Check is hand-crafted using only the highest quality, laboratory-grade, borosilicate glass for maximum strength, durability, and visual clarity. Each piece is unique.
Top Compartment - "Indicator" solution
Bottom Compartment - "Reference" solution
No solution preparation required. Required solutions are premade and included.
Improved durability and ease of use
Easy to fill and remove solutions from both chambers
Simple to use, simple to read, higher accuracy than other single-compartment checkers
Approximate size without suction cup: 2"x1.5" (HxW)
Included:
One (1) Suction Cup
One (1) Bottle of CO2 "Indicator" Solution (15 mL)
One (1) Bottle of CO2 "Reference" Solution calibrated to 30ppm CO2 (15 mL)
2 Reference chamber plugs
Instructions for use
3 Reviews Hide Reviews Show Reviews
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Wicked good
Very nice piece. Could only find this in the UK. Chuffed I could get it in the USA. This thing is perfect. Best part if it is the fact that within 30 mins it will already be showing you what your levels are. Others take 1 or 2 hours which can be misleading.
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Nice co2 checker
Works like is says, it does change color in response to co2 that's dissolved in the water. It's not hard to refill.
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Beautiful piece.
The drop checker really is a piece of art. It seems to work well and looks great in the tank. Only reason I didn't give it 5 stars is the bend into the upper chamber is too narrow and makes it a frustrating chore to get the liquid in and out of it, let alone cleaning.
3 Reviews Hide Reviews Show Reviews
-
Wicked good
Very nice piece. Could only find this in the UK. Chuffed I could get it in the USA. This thing is perfect. Best part if it is the fact that within 30 mins it will already be showing you what your levels are. Others take 1 or 2 hours which can be misleading.
-
Nice co2 checker
Works like is says, it does change color in response to co2 that's dissolved in the water. It's not hard to refill.
-
Beautiful piece.
The drop checker really is a piece of art. It seems to work well and looks great in the tank. Only reason I didn't give it 5 stars is the bend into the upper chamber is too narrow and makes it a frustrating chore to get the liquid in and out of it, let alone cleaning.
