UK-made · biological CO₂

CO₂ for your plants' world.
No cylinder. No wires. No noise.

Carbon Chonks are small biological blocks for propagators, terraria and enclosed growing setups. Add water and the microorganisms inside get to work — releasing carbon dioxide into the space. That's the whole job: it makes CO₂.

Launching soon · shipping to mainland Great Britain

1,600 ppmCO₂ by day 2 in a closed propagator
(ambient air ≈ 400 ppm)
Self-regulating~1,050–1,360 ppm across the day,
no misting
Biodegradablebecomes spent organic matter —
nothing to throw away

What it is

A small block of live, naturally-occurring soil microorganisms on a biodegradable substrate. Add water to activate; it produces CO₂ as it works.

How you use it

Drop it into an enclosed setup — propagator, terrarium, sealed cabinet — add water, and close it up. It self-regulates between top-ups. Turns green as it activates.

Why it's different

No gas cylinders to store or certify, no electrics, no pump. Silent, no odour, UK-made. When it's spent it simply breaks down.

For plant shops & growers

Stocking Carbon Chonks? We send free samples and a one-page data sheet, and offer wholesale tiers. Drop us a line and we'll get a box out to you.

Get trade samples