| OxyGuard Marlin+ Standard with DO Probe, for 24 VDC supply | groaqua.store | 1486.88 GBP | — | — |
| OxyGuard CO2 Probe for Pacific and Marlin | groaqua.store | 1208.05 GBP | — | — |
| OxyGuard CO2 Probe with 7 metre Cable | groaqua.store | 1208.05 GBP | — | — |
| OxyGuard Marlin+ Advanced, for control of paddle wheels, blowers,without probe, for 24 VDC supply | groaqua.store | 1168.04 GBP | — | — |
| OxyGuard Marlin+ Standard without probe, for 24 VDC supply | groaqua.store | 879.64 GBP | — | — |
| OxyGuard Type 3 Purity Probe 7mtr (High Range) | groaqua.store | 640.09 GBP | — | — |
| OxyGuard Polaris C MaxiTemp | groaqua.store | 462.74 GBP | — | — |
| OxyGuard CO2 Calibration Beaker with stirrer magnet | groaqua.store | 336.34 GBP | — | — |
| Replacement Membrane Cap for Handy Polaris D.O. Meter | dynamicaquasupply.com | 119 CAD | — | — |
| 12v DC Battery Pack for calibration beaker | groaqua.store | 95.96 GBP | — | — |
| Replacement Battery Cover for Handy Polaris D.O. Meter | dynamicaquasupply.com | 92 CAD | — | — |
| Electrolyte, 1000 ml, for Oxyguard Handy Polaris D.O. Meter | dynamicaquasupply.com | 47 CAD | — | — |
| Membrane O-Ring Kit (10 Piece), for Oxyguard Commander D.O. Probe | dynamicaquasupply.com | 33 CAD | — | — |
| Membrane O-Ring Kit (10 Piece), mg/L for Oxyguard Stationary D.O. Probe | dynamicaquasupply.com | 33 CAD | — | — |
| Membrane O-Ring Kit (10 Piece), %sat/% Vol for Oxyguard Stationary D.O. Probe | dynamicaquasupply.com | 33 CAD | — | — |
| Membrane O-Ring Kit (10 Piece) for Oxyguard Polaris D.O. Meter | dynamicaquasupply.com | 33 CAD | — | — |
| Replacement Handy Tool for Handy Polaris D.O. Meter | dynamicaquasupply.com | 32 CAD | — | — |
| Dosing Spoon for OxyGuard CO2 Analyser | groaqua.store | 26.26 GBP | — | — |
| Oxyguard pH7 Buffer - Perfect for Calibration and Testing | groaqua.store | 19.18 GBP | — | — |
| Electrolyte, 250 ml, for Oxyguard Handy Polaris D.O. Meter | dynamicaquasupply.com | 18.25 CAD | — | — |
| Electrolyte, 60 ml for Oxyguard Handy Polaris D.O. Meter | dynamicaquasupply.com | 8.8 CAD | — | — |
| Dosing Syringe for OxyGuard CO2 Analyser | groaqua.store | 4.93 GBP | — | — |