JBL ProFlora CO2 Advanced Set M Review
A complete pressurised CO2 system in one box from a trusted German brand: refillable cylinder, regulator with night shut-off, bubble counter, reactor and test — everything a planted tank needs to start.
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👍 Pros
- Genuinely complete: refillable cylinder, regulator, night shut-off valve, bubble counter, reactor and CO2 test in one box
- Night shut-off stops CO2 when the lights go off, protecting fish overnight
- Two pressure gauges make it easy to see cylinder and working pressure at a glance
- Refillable 500 g cylinder is cheaper to run long-term than disposable canisters
👎 Cons
- Pricier upfront than buying a bare regulator and cylinder separately
- Reactor diffusion is effective but less discreet than a fine-mist glass diffuser in a scape
- Refilling the JBL cylinder can mean a trip to a stockist depending on your area
Everything in one box
The JBL ProFlora CO2 Advanced Set M is the antidote to the biggest barrier to pressurised CO2: working out which parts you need and whether they fit together. It arrives as a complete system — a refillable 500 g cylinder, a regulator with two pressure gauges, a night shut-off valve, a bubble counter, a reactor for diffusion and a CO2 test — so a planted tank between 40 and 600 litres can go from unboxed to injecting without a shopping list. For a first pressurised setup, that matters.
Automate it, then verify it
The kit is built to run the right way. The night shut-off stops CO2 when the lights go off, since plants only use it in the light and overnight injection risks pushing levels dangerously high. For the tightest control, put the system on a wall timer so gas comes on about an hour before lights and off about an hour before lights-out. Then use the included CO2 test as a drop checker — aim for a lime-green reading and adjust the flow a little at a time over several days. Automation plus a drop checker is what makes pressurised CO2 both effective and safe for your fish.
How it fits with our other CO2 picks
If you would rather build a system than buy a kit, the dual-stage CO2Art Pro-SE regulator is the core to start from, paired with an Aquario Neo diffuser and a NilocG glass drop checker. For another all-in-one option, compare the FZONE compact CO2 kit. Not ready for pressurised gas? A liquid-carbon supplement like Seachem Flourish Excel is a gentler start. For the full line-up, visit our CO2 systems hub, and match your light and ferts on the lighting and plant fertilizer hubs.
The easiest way to go pressurised in one purchase: a trusted-brand kit with a refillable cylinder, night shut-off and everything else included. You pay a little more than assembling parts, but you get a matched system that just works.
JBL ProFlora CO2 Advanced Set M — frequently asked questions
Is a complete kit better than buying parts separately?
For most people starting out, yes. A kit like the ProFlora Advanced Set M guarantees the regulator, cylinder, valve, bubble counter and diffusion all match and work together out of the box, with no compatibility guesswork. Buying a bare regulator such as the CO2Art Pro-SE and adding your own cylinder and diffuser can be cheaper and more customisable, but the kit is the simplest path to a working pressurised system.
What does the night shut-off actually do?
Plants only use CO2 in the light, so injecting it overnight is wasteful and can drive CO2 too high while fish are still respiring. The night shut-off closes the gas when the lights go off. For the tightest control, plug it into a wall timer so CO2 comes on about an hour before lights and off about an hour before lights-out, and confirm the level with a drop checker.
Do I need a drop checker with it?
Yes — always. The included CO2 test lets you confirm the real in-tank CO2 level rather than guessing from the bubble counter. Aim for a lime-green reading with a 4dKH solution and adjust the flow a little at a time over several days. A drop checker is your safety net against gassing the fish.
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