Colombo CO2 Reactor REFILL

$11.21 ~~$16.98~~ In stock

You need refill A & B for your Colombo CO2 Reactor (so two bags). These easy to use pouches make creating your own CO2 (mix with tap water) a complete breeze.

These pouches have replaced the original boxed version which contained several smaller pouches in one box.

Each bag contains 1000g.

Please choose the option:

Component A
Component B
Component A & B Set

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Customer Reviews (4.6 / 5 · 5 reviews)

Zoe ★★★★★ Oct 19, 2026

Since I swapped out the old canisters for these refill pouches, my plants have never looked greener. The two-bag system mixes cleanly with tap water, and the CO₂ production is steady for weeks.

Sebastian J. ★★★★★ Oct 14, 2026

Didn't realize I needed both pouch A and B until I read the reactor instructions, but the two-bag setup is actually simple once you get going. CO2 output picked up within a day of refilling, and my plants have been pearling every afternoon since. Cheaper than swapping cartridges too.

Timothy W. ★★★★★ Oct 13, 2026

Mixing the two pouches with tap water took maybe a minute, and my reactor had steady CO2 bubbling within a couple hours. Each refill pack lasts a good while in my 60L tank, so the two-bag setup works out cheaper than I expected.