Aquarium CO2 Guide

Everything you need to know about CO2 injection for a thriving planted aquarium.

Why CO2?

Carbon dioxide is the single biggest driver of fast, healthy plant growth and dense carpets. High-tech scapes rely on it.

Setting up CO2

A pressurised CO2 system with a regulator, diffuser and drop checker is the standard. Aim for 20-30 ppm using our CO2 calculator, run it on a timer with the lights, and add surface agitation at night to protect fish.