| |
GRO Cartridge Kit |
GRO System |
DS-Mini System |
PRO-DS System |
| Best For |
Aquarists seeking a compact cartridge-based CO2 setup with refillable-cylinder flexibility |
Aquarists seeking a streamlined refillable single-stage CO2 system |
Aquarists seeking compact dual-stage pressure regulation with modular multi-aquarium capability |
Aquarists seeking full-size dual-stage architecture, expanded working-pressure capability, dual-gauge monitoring, and modular scalability |
| Why Choose It? |
Compact 74g cartridge configuration with an included CGA-320 adapter for future refillable-cylinder use |
Straightforward refillable CO2 system with precise control and optional multi-aquarium expansion |
Dual-stage pressure regulation and modular flexibility in a compact footprint |
Full-size dual-stage platform with 0–140 PSI output, dual gauges, and flexible modular configuration |
| CO2 Source |
74g disposable CO2 cartridge; compatible with standard CGA-320 refillable cylinders using the included adapter |
Refillable 5 lb aluminum CO2 cylinder |
Refillable 5 lb aluminum CO2 cylinder |
Refillable 5 lb aluminum CO2 cylinder |
| Pressure Reduction |
Single-stage |
Single-stage |
Dual-stage |
Dual-stage |
| Pressure Monitoring |
Integrated working-pressure gauge |
Integrated working-pressure gauge |
Integrated working-pressure gauge |
Separate cylinder-pressure and working-pressure gauges |
| Working / Output Pressure |
0–70 PSI |
0–70 PSI |
0–60 PSI |
0–140 PSI |
| Expansion / Flexibility |
Transition from 74g cartridge use to a standard CGA-320 refillable CO2 cylinder with the included adapter |
Optional GRO CO2 Splitter for multiple aquariums |
Selectable 1–6 output modular manifold system |
Selectable 1–6 output modular manifold system |
| CO2 Distribution |
Single aquarium configuration |
Standard single-aquarium configuration; expandable to multiple aquariums with optional splitter |
1–6 independently controlled aquarium outputs |
1–6 independently controlled aquarium outputs |
| System Architecture |
Compact cartridge-based GRO single-stage system |
Refillable GRO single-stage system |
Compact modular dual-stage system |
Full-size modular dual-stage system |
| Included CO2 Source |
1 x 74g disposable CO2 cartridge |
1 x 5 lb aluminum CO2 cylinder; optional second cylinder available |
1 x 5 lb aluminum CO2 cylinder; optional second cylinder available |
1 x 5 lb aluminum CO2 cylinder; optional second cylinder available |
| Integrated Solenoid |
Yes |
Yes |
Yes |
Yes |
| GLA Limited Lifetime Warranty |
Yes — regulator |
Yes — regulator |
Yes — regulator |
Yes — regulator |
| Lifetime Support |
Yes |
Yes |
Yes |
Yes |
| Starting At |
$200 |
$325 |
$400 |
$450 |
