AquaticLife Twist-In 100 GPD — 4-Stage RO/DI Reverse Osmosis System Tool-Free 378 L/day

The AquaticLife Twist-In 100 GPD Reverse Osmosis System is a compact 4-stage RO/DI unit that delivers up to 100 US gallons (378 L) of purified water per day. The signature Twist-In cartridges swap in seconds - no tools, no need to shut off the water, no mess. Designed for reef aquariums and saltwater changes.

4-Stage Twist-In Filtration

• Stage 1 - 5-Micron Sediment Cartridge (Item 330377): traps sand, rust and particles.
• Stage 2 - Carbon Block Cartridge (Item 330379): reduces chlorine by up to 99% and conditions the water before the membrane.
• Stage 3 - Twist-In RO Membrane (Item 330375): reduces total dissolved solids down to 1/10,000 of a micron; retains arsenic, lead, copper and parasitic cysts.
• Stage 4 - Mixed-Bed Color-Changing DI Resin (Item 330380): polishes the water; the resin turns amber when spent.

Tool-Free Twist-In Design

• Cartridge change in a quarter turn - no tools, no contact with used media.
• No need to shut off the water to replace a cartridge.
• Triple-sealed cartridges for leak-free operation.
• Pivoting cartridge heads, ideal for tight spaces.
• Small footprint: fits under a cabinet or in a small space.
• Mounting brackets included.
• Complete install kit: tubing, water supply connectors and drain connector.

Operating Conditions (AquaticLife specs)

• Minimum water pressure: 30 psi.
• Suggested pressure: 65 psi.
• Maximum pressure: 80 psi.
• Optimal water temperature: 25 degrees C (77 degrees F).
• Dimensions: 12 x 4 x 13 in. Weight: 7 lb.

Cartridge Replacement

• Sediment cartridge 330377: AquaticLife recommends replacing every 6 months.
• Carbon Block cartridge 330379: replace every 6 months.
• RO membrane 330375: replace every 1 to 2 years.
• DI resin 330380: replace when all resin has turned amber.

Use in Reef Aquariums

In a reef aquarium, tap water contains phosphates, silicates, chlorine and metals that can fuel algae and stress corals. The Twist-In unit produces water suitable for reef salt mixing and water changes.

Why Buy AquaticLife at ReefSolution

ReefSolution is a marine aquarium specialty store based in Laval, Quebec, shipping across Canada. To complete your setup:

• AquaticLife Twist-In Sediment Cartridge - stage 1 replacement.
• AquaticLife Twist-In Carbon Block Cartridge - stage 2 replacement.
• AquaticLife Twist-In RO Membrane 100 GPD - stage 3 replacement.
• AquaticLife Twist-In Color-Changing DI Cartridge - stage 4 replacement.
• AquaticLife Smart Buddie 200 GPD Booster Pump - booster pump for installations below 40 psi.

Frequently Asked Questions

How much water does the Twist-In 100 GPD produce per day?

Up to 100 US gallons (378 L) of purified water per day under the manufacturer's optimal conditions: approximately 65 psi and 25 degrees C.

What water pressure is required?

AquaticLife lists a minimum of 30 psi, a suggested pressure of 65 psi and a maximum of 80 psi.

How do you replace a Twist-In cartridge?

A quarter turn is all it takes. No tools, no contact with the used media, and there is no need to shut off the water supply to change a cartridge.

How often should the cartridges be replaced?

AquaticLife recommends replacing the sediment and Carbon Block cartridges every 6 months. The RO membrane is replaced every 1 to 2 years. The DI resin is replaced when all resin has turned amber.