---
product_id: 13890748
title: "AR-122 6-stage RO+DI Aquarium Reef Reverse Osmosis Water System 150 GPD New Complete"
brand: "koolermax"
price: "€ 458.96"
currency: EUR
in_stock: true
category: "Koolermax"
url: https://www.desertcart.pt/products/13890748-ar-122-6-stage-ro-di-aquarium-reef-reverse-osmosis
store_origin: PT
region: Portugal
---

# 150 GPD ultra-pure output 6-stage multi-filter system Made & assembled in USA AR-122 6-stage RO+DI Aquarium Reef Reverse Osmosis Water System 150 GPD New Complete

**Brand:** koolermax
**Price:** € 458.96
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your aquatic game with ultra-pure water on demand!

## Quick Answers

- **What is this?** AR-122 6-stage RO+DI Aquarium Reef Reverse Osmosis Water System 150 GPD New Complete by koolermax
- **How much does it cost?** € 458.96 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/13890748-ar-122-6-stage-ro-di-aquarium-reef-reverse-osmosis)

## Best For

- koolermax enthusiasts

## Why This Product

- Trusted koolermax brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Pure Powerhouse:** Delivers up to 120 gallons/day of near-zero TDS water for flawless reef and hydro setups.
- • **Smart Filter Alerts:** Color-changing DI resin signals when it’s time to replace, so you never miss peak performance.
- • **Plug & Play Installation:** Complete kit with tubing, adapters, and hardware for seamless under-sink or garden hose setup.
- • **Advanced 6-Stage Filtration:** Sediment, dual carbon, RO membrane, and color-changing DI filters ensure crystal-clear purity.
- • **Trusted American Craftsmanship:** 23+ years of expertise, designed and assembled in Santa Ana, CA for unmatched reliability.

## Overview

The AR-122 is a premium 6-stage RO+DI water purification system delivering up to 120 gallons per day of ultra-pure water, ideal for aquariums, hydroponics, and misting. Featuring sediment, carbon, RO membrane, and color-changing DI filters, it reduces TDS from 300ppm to near zero. Designed and assembled in the USA with 23+ years of proven reliability, it includes all installation hardware for easy under-sink or garden hose connection.

## Description

This listing is a 6-stage RO+DI Reverse Osmosis + Deionization water purification system. It is designed to tap into your water supply line under-the-sink or to a garden hose valve. Once it is connected to water supply with above 45 psi input pressure, the system is able to purify the tap water into ultrapure water at a rate of 120 gallons per day or about 5 gallons per hour. For example, if the water quality of tap water is 300ppm, after 4th stage RO membrane filter, the TDS reading will be reduced to about 25ppm, then the 5th & 6th stage DI filters would further reduce the TDS to 5ppm to 0 ppm. The filters used in the system are, 1st stage sediment filter, 2nd & 3rd stage carbon filter, 4th stage TFC-150 RO membrane, 5th & 6th stage color changing DI filters. DI resin changes to black color when it is exhausted. The system includes all filters, tubing, under-the-sink adapter and installation hardware, and extra garden hose adapter, and instruction, and free tech support in USA. This system is designed and assembled in Santa Ana, CA, USA. We have been making RO systems for 23+ years. They systems we built are reliable and guaranteed to perform.

## Features

- 6 stage RO DI water system for Aquarium, aeroponics, misting, hydroponics, ultra pure water applications
- Use high capacity 150GPD RO membrane and generate 120 gallons per day on average household water supply pressure
- 1st stage sediment filter, 2nd & 3rd stage carbon filter, 4th stage TFC-150 RO membrane, 5th & 6th stage color changing DI filters
- The system comes complete with all filters, tubing, instruction, under-the-sink installation hardware and extra garden hose adapter
- This system is designed and assembled in Santa Ana, CA, USA. We have been making RO systems for 23+ years. The systems we built are reliable and guaranteed to perform

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00U1TPBZY |
| Best Sellers Rank | #251,589 in Pet Supplies ( See Top 100 in Pet Supplies ) #1,178 in Aquarium Filters |
| Brand Name | Koolermax |
| Capacity | 120 gallons |
| Container Type | Tube |
| Customer Reviews | 4.4 4.4 out of 5 stars (154) |
| Included Components | Filter, Tubing, Drain Saddle, Inlet Hose, Outlet Hose, RO System, Instruction Manual |
| Installation Type | Under Sink |
| Item Dimensions L x W x H | 16"L x 5.5"W x 16"H |
| Item Weight | 17 pounds |
| Manufacturer | Koolermax |
| Material Type | Resin |
| Model Name | AR - 122 |
| Model Number | AR-122 |
| Number of Items | 1 |
| Other Special Features of the Product | Multi Stage Filtration, Chlorine Reduction, Reduce TDS |
| Part Number | AR-122 |
| Power Source | Adapter |
| Purification Method | Reverse Osmosis |
| Supported Water TDS Level Maximum (PPM) | 300 |
| UPC | 784672794787 |
| Unit Count | 1 Count |
| Upper Temperature Rating | 100 °F |

## Product Details

- **Brand:** Koolermax
- **Capacity:** 120 gallons
- **Included Components:** Filter, Tubing, Drain Saddle, Inlet Hose, Outlet Hose, RO System, Instruction Manual
- **Installation Type:** Under Sink
- **Material:** Resin
- **Package Information:** Tube
- **Power Source:** Adapter
- **Product Dimensions:** 16"L x 5.5"W x 16"H
- **Purification Method:** Reverse Osmosis
- **Special Feature:** Multi Stage Filtration, Chlorine Reduction, Reduce TDS

## Images

![AR-122 6-stage RO+DI Aquarium Reef Reverse Osmosis Water System 150 GPD New Complete - Image 1](https://m.media-amazon.com/images/I/51Si8aHn7mL.jpg)
![AR-122 6-stage RO+DI Aquarium Reef Reverse Osmosis Water System 150 GPD New Complete - Image 2](https://m.media-amazon.com/images/I/51vVrMDsgFL.jpg)
![AR-122 6-stage RO+DI Aquarium Reef Reverse Osmosis Water System 150 GPD New Complete - Image 3](https://m.media-amazon.com/images/I/51f-ZOFMDLL.jpg)
![AR-122 6-stage RO+DI Aquarium Reef Reverse Osmosis Water System 150 GPD New Complete - Image 4](https://m.media-amazon.com/images/I/51nY2dUbu0L.jpg)
![AR-122 6-stage RO+DI Aquarium Reef Reverse Osmosis Water System 150 GPD New Complete - Image 5](https://m.media-amazon.com/images/I/41BfjZpJ72L.jpg)

## Questions & Answers

**Q: how far can the purified water tube extend? im trying to run it a few feet like about 50 give or take.**
A: It comes with 10 foot tubing. Fifty sounds like a lot, but I can't see why you can't do it other than making sure it is one piece to avoid leaks. I will ask in a reef forum for you to be sure, but I would say as long as you're not trying to run the ouput tubing upstairs it should be okUPDATE:  Nobody I asked has ever run more than 25 feet.  Those who do let it run a few minutes before collecting water to make sure it's all "fresh".  I think 50 is a lot, so maybe it's not quite that far?  Why do you have such a long run?  Mine is very short by design, but I could have put my RO/DI unit and my collection bucket in different places and would still not have more than 20 feet.  If you could provide details I am happy to help if I can.

**Q: I have water pressure of 100 will this damage the unit or just reduce its effectiveness**
A: The unit came with a valve to control the pressure going into the unit

**Q: Flow restrictor is shown on the waste line but none was provided in the included parts.  Is it required?**
A: You may want to double check your waste line, my unit came with it already installed on waste side. And yes, the flow restrictor is a must on ro systems as they create pressure throughout the membrane and maintain adequate reject and permeate flow.

**Q: one of the DI filters are leaking. Has anyone else had this problem?**
A: Similar problem first time removing filter canister.  Wiped threads clean and lubricated threds with a very small amount of silicone lubricant.  Canister hand tightened an additional full turn and did not leak.  Also insured sealing surfaces clean and not craked or deformed.

## Frequently Bought Together

- Koolermax AR-122 6-stage RO+DI Aquarium Reef Reverse Osmosis Water System 150 GPD New Complete
- Malida 1/4 inch O.D. Length 32.8ft(10 meters) RO Water Tubing, Hose Pipe for RO Water purifiers System,+ 1/4 O.D quick connector 10pcs

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-11-13*