• Dymax Crystal CO2 Indicator, Small
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Dymax

Dymax Crystal CO2 Indicator, Small

Dymax Crystal CO2 Indicator, Small

$17.99
$17.99
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Small Glass Drop Checker for Monitoring CO2 in Planted Aquariums

Dymax Crystal CO2 Indicator, Small, is a compact glass drop checker built to monitor CO2 levels in planted tanks. Paired with Dymax CO2 Indicator Solution (sold separately), the solution inside changes color to show whether CO2 injection is excessive, optimal, or insufficient, giving a quick visual read without a separate meter or test kit.

At 2" x 1", the small size suits nano tanks and smaller planted setups where a compact drop checker fits more easily against the glass without crowding the aquascape.

Key Features:

  • Glass construction for a clear, accurate color read
  • Shows excessive, optimal, or insufficient CO2 at a glance
  • Compact 2" x 1" size, suited to nano and smaller planted tanks
  • Includes a suction cup for mounting inside the tank
  • Backed by a 1-year warranty from CoralVue and Dymax

Ideal For:

  • Nano planted tanks and smaller aquascapes where space near the glass is limited
  • Hobbyists running CO2 injection who want an ongoing visual check between water tests
  • Anyone dialing in CO2 levels for the first time and wanting a simple, low-cost monitoring method

Pro Tips:

  • Mount it at mid-to-low water level, not near the surface. CO2 tends to be less concentrated near the surface, so a mid-tank placement gives a more representative reading of what plants are actually receiving.
  • Give it time to stabilize after refilling. The indicator solution takes a while to fully react to a water change, so wait a few hours before judging the color against the reference chart.

Online exclusive: this item is ordered in for you and is usually ready within a few business days. Choose in-store pickup, local delivery or shipping at checkout.

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