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Colombo CO2 Basic REFILL

Colombo CO2 Basic REFILL - Main image
$3.68 $5.49 In stock

Category: Aquarium CO2

The Colombo CO2 Basic Refill provides a reliable source of carbon dioxide for your aquarium, designed as a direct replacement for the original 12‑gram bottle that comes with the Colombo CO2 Kit Basic.

  • 12 g CO₂ capacity – matches the original kit bottle.
  • Specifically compatible with the Colombo CO2 Kit Basic.
  • Simple, hassle‑free installation.
  • High‑purity CO₂ for consistent plant health.
  • Packaged by Colombo, a trusted aquarium brand.
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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Riley ★★★★★

The 12-gram size threaded on perfectly to my existing setup, no leaks at all. For the price, getting a proper CO2 source instead of messing with liquid carbon was a no-brainer. My plant growth has been stable and consistent since switching to these refills.

Mia F. ★★★★★

My tank plants perked up noticeably within a week after switching to this refill. The 12-gram canister fits perfectly into the existing setup, no fiddling required.

Amelia ★★★★★

The 12-gram size matches my kit exactly, so it screws in without any fiddling. Levels held steady for weeks and my plants finally started pearling again.