Invaders CO2 Tablets (100 Pack) - Root-Zone CO2 Boost for Any Substrate
Best for: growers who want a cheap, no-equipment way to supplement CO2 at the root zone without running a gas system.
Our thoughts
Worth flagging: this listing's web address still says "no-mercy-co2-tablets-x-60," a leftover from an older product page. The title, brand and pack size on this listing are all "Invaders CO2 Tablets, 100 Pack," which is a genuine, widely-stocked product in its own right, and a completely different item to "No Mercy" CO2 tablets (a separate 60-tablet product from a different manufacturer, No Mercy Supply). We've written this listing for the Invaders 100-pack that's actually live and priced here, not the old No Mercy product the URL still references.
Invaders CO2 Tablets are a simple, no-equipment way to supplement CO2 at the root zone rather than in the air around the plant. Each tablet dissolves in your reservoir or watering can to form carbonic acid, which the root system absorbs and transports to the leaves to support photosynthesis, working alongside (not instead of) whatever CO2 is naturally available in the growing environment.
This is a substrate-agnostic product, usable in soil, coco or hydro reservoirs, with no CO2 generator, gas bottle or ventilation changes required. It's aimed at growers who want a low-cost, low-complexity CO2 supplement rather than the cost and complexity of a dedicated CO2 enrichment system.
How it compares
Root-zone CO2 tablets are a distinct, low-tech category compared with air-based CO2 enrichment systems.
- Versus No Mercy CO2 Tablets: a separate product from a different manufacturer (No Mercy Supply, Netherlands) sold in 60-tablet packs; broadly the same root-zone concept, but not the same brand, tablet count or price point as this Invaders 100-pack.
- Versus bottled or generator-based CO2 enrichment: gas-based systems raise ambient CO2 around the whole canopy and need monitoring and ventilation control, while tablets are a simple add-to-reservoir product with no equipment or safety considerations around gas buildup.
- Versus fermentation-based CO2 bags: bag-based CO2 generators work passively in the air over weeks, whereas tablets deliver a direct, root-zone dose each time you dose your reservoir.
Not a substitute for full CO2 enrichment in a sealed room, but a genuinely simple, low-cost way to give roots an extra source of carbonic acid.
Usage guidance
Straightforward to dose alongside your normal feeding routine.
Dosage
Add 1 tablet per 100 litres of water or nutrient solution.
Coverage
Each tablet is intended to support an area of roughly 1.2 x 1.2 metres.
Where to use it
Add directly to your reservoir or nutrient tank; works across soil, coco and hydro setups without any change to your existing feeding schedule.
Technical specifications
- Format: Dissolving tablets
- Pack size: 100 tablets
- Mechanism: Forms carbonic acid in solution, absorbed via the root system
- Dosage: 1 tablet per 100 litres of water
- Coverage per tablet: Approx. 1.2m x 1.2m
- Compatible media: Soil, coco, hydroponic reservoirs
- Brand: Invaders (CO2 Invaders)
Who this is for
- Growers wanting a simple CO2 supplement without a gas-based enrichment system
- Budget-conscious growers looking for an easy addition to an existing feeding routine
- Anyone running soil, coco or hydro reservoirs who wants root-zone CO2 support
- Not a substitute for full ambient CO2 enrichment in a sealed grow room
Our take
A cheap, simple way to add another growth-supporting input to your feeding routine, and one that's genuinely easy to dose correctly given how the tablets are measured out.
One we sell a lot of for new growers looking for an easy win.
