• No gas bottles or refill trips — CO2 comes from mixing citric acid and bicarbonate of soda with water in the reaction cylinder, both sold separately as Bioscape CO2 Reagent A and Reagent B.
• SUS304 stainless steel cylinder — built to withstand roughly ten times the pressure the reaction actually produces.
• Manual on/off valve — simple control with no wiring or timer required.
• Long runtime per charge — Bioscape rates one charge at roughly 60 days or more, running at one bubble per second.
• Built-in bubble counter — see your CO2 rate at a glance without a separate accessory.
• Pressure relief built in — the regulator releases gas automatically if pressure runs high, rather than relying on you to catch it.

This is a reagent-based generator, not a complete plug-and-play CO2 kit — read both lists before you order.

• Included: reaction cylinder, pressure regulator with on/off valve, bubble counter, fill funnel, and hosing.

• Not included: Reagent A (citric acid, 200 g) and Reagent B (sodium bicarbonate, 200 g), both sold separately and needed before the reactor can run; a CO2 diffuser — this model does not include one (see the Bioscape CO2 Diffuser, BIS15, or the Reactor with Solenoid and Diffuser below if you want one bundled in).

Both reactors share the same cylinder, working pressure and rated runtime — the difference is entirely in how the gas is switched on and off, and whether a diffuser is in the box.

Bioscape's published figure is a single reference point: at one bubble per second, a charge lasts roughly 60 days or more. Bioscape has not published a full table of runtime against bubble rate, so treat this as a guide rather than a precise curve — a faster bubble rate will use the charge more quickly than 60 days, and a slower one will stretch it further.

Add the citric acid and bicarbonate to the reaction cylinder through the supplied funnel, tilt the cylinder to roughly 45 degrees, then add the 300 mL of water. Screw the regulator and cylinder back together promptly without over-tightening. Fill the bubble counter with water and fit it to the fine adjustment valve, then open the on/off valve to start gas flow.

The cylinder walls get cold during the reaction — this is normal chemistry, not a fault. The regulator has a pressure relief valve that releases gas automatically if pressure runs high. Handle the bubble counter gently rather than forcing it off; mechanical damage from misuse isn't covered under warranty.

Bioscape's manual notes the desiccant beads inside can be dried out in an oven and reused once they change colour, and that all components should be kept dry when the reactor isn't in use.

Covered for 12 months against manufacturing faults, on top of your consumer guarantee rights under Australian Consumer Law. This is a bulkier item and attracts additional freight, confirmed at checkout.

Do I need a gas bottle or a refill service to run this?

No. CO2 comes from mixing Reagent A (citric acid) and Reagent B (sodium bicarbonate) with water inside the cylinder — both reagents are sold separately.

Does it come with a diffuser?

No. This on/off valve model doesn't include one — the Bioscape CO2 Diffuser (BIS15) is sold separately, or the Reactor with Solenoid and Diffuser (ARI11) includes one in the box.

How long does one charge last?

Bioscape's figure is roughly 60 days or more at one bubble per second — actual runtime will vary with your bubble rate.

Can I automate it with a timer?

Not this model — the on/off valve is manual. For timer-driven control, the Reactor with Solenoid and Diffuser (ARI11) has an electronic solenoid built in.