The Dymax CO2 Splitter 3 Way lets you run three separate CO2 setups from a single cylinder, splitting one CO2 inlet into three individually controlled outlets. It’s made from high-grade cast aluminium, keeping it lightweight while resisting corrosion.

Each outlet has its own needle valve, so you can fine-tune the CO2 flow to each tank or diffuser independently rather than sharing one fixed rate across all three. Running this alongside a regulator? Our Dymax CO2 Mini Regulator is a compatible pairing, and you’ll need a diffuser on each line, our Dymax CO2 Stainless Steel Diffuser 8cm is a good fit for most setups.

Features & Benefits

Splits one CO2 cylinder across three separate outlets, ideal for running multiple planted tanks from a single source.
Individual needle valve control on each outlet for precise, independent flow adjustment.
Lightweight, corrosion-resistant cast aluminium construction.
Hand-tighten design, no tools required.
Suits both planted freshwater and marine aquariums.