Aquarium RO/DI Systems, Reverse Osmosis Filters & Accessories

Browse aquarium reverse osmosis and RO/DI systems, replacement filters and accessories at The Tech Den Australia. Compare Reef Pure Essentials, Essentials Plus, Premium and Expert units, alongside service kits, DI resin and Auto Aqua monitoring and shut-off equipment.

Explore systems, replacement filters and accessories

RO/DI systems: compare four-stage and six-stage Reef Pure models with listed ratings of 50, 100 and 400 GPD. Check the individual system specifications and installation requirements before choosing.
Replacement filtration: browse sediment filters, carbon block and granular activated carbon cartridges, mixed-bed colour-changing DI resin and model-specific service kits.
Monitoring and fittings: explore Auto Aqua Titanium S1 and S2 inline TDS meters, the Smart ASOV electronic shut-off valve, a tap-to-tubing fitting and a housing wrench.
Related aquarium equipment: this collection also includes the Giant Pacific ReeFill automatic top-off unit and Auto Aqua Smart Stir for test reagents. These are not reverse osmosis filters.

Choose a system and compatible replacements

Match replacement cartridges, membranes, resin and service kits to your exact system model, housing dimensions and connection sizes. Check each kit's contents rather than assuming all four-stage or six-stage kits are interchangeable.

Listed GPD ratings are a comparison point, not a guarantee of output under every installation condition. Follow the manufacturer's requirements for water supply, pressure, temperature, installation and maintenance. Use suitable water testing to guide preparation for your aquarium and your livestock's requirements.

Check each product listing for delivery conditions. The Reef Pure system listings in this range are marked as bulky, with additional delivery costs calculated at checkout.