Cal Aqua Labs Double Counter ER

Cal Aqua Labs Double Counter ER

  • Made of high-quality glass
  • Suitable for smaller and larger amounts of CO2
  • Easy determination of the amount of CO2 added
  • Visually very appealing
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The Double Counter ER from Cal Aqua Labs is a practical and beautiful bubble counter. Placed between the pressure reducer and the aquarium, the bubble counter makes it possible to visually check the supply of CO2 to the aquarium. Thanks to its special design, it can also be used to easily count a higher CO2 supply.
The constant flow of CO2 causes evaporation inside the Double Counter ER. To quickly refill the lost liquid, the silicone plug can be removed and the water level can be adjusted again. This eliminates the need to disconnect the CO2 tubing. Cal Aqua Labs has manufactured the Double Counter ER from high-quality borosilicate glass in laboratory quality. This ensures maximum strength, durability and optical clarity and makes each piece unique. Also available as Double Counter without funnel function.


  • Nice CO2 bubble counter also for larger feed quantities
  • With practical funnel function
  • Made of clear and sturdy borosilicate glass


Cal Aqua Labs Double Counter ER
Length 95 mm
Wide 17 mm


We recommend to use soft silicone tubing to connect the glassware in order to reduce the risk of glass breakage. The piece of hose used should be kept as short as possible in order to avoid unnecessary CO2 losses.
Silicone hose is not pressure resistant and therefore can not be used for connection to the pressure regulator.

Cal Aqua Labs

Cal Aqua Labs

A stunning quality and innovative ideas around glassware articles for aquascapes have a name: Cal Aqua Labs. Lily pipes, permanent CO2 tests or inline diffusers are manufactured by highly experienced glass blowers. Their basic material is glass of the highest quality, whose clarity and stability is just stunning. The glassware is carefully manufactured by hand in keeping with very high quality standards. Every aquascape is embellished by these beautiful yet unobtrusive glassware products.

Those who do not want to compromise when it comes to glassware for aquascaping are exactly right to look at products by Cal Aqua Labs.

General information

Item no.
EAN 0645080909852
Weight 0,30 kg
Shipping weight 0,30 kg

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