---
product_id: 13337170
title: "Koolermax AR-125 6-stage RO+DI Aquarium Drinking water RO system 80 to 120 GPD New complete 2 outputs"
brand: "koolermax"
price: "€ 493.09"
currency: EUR
in_stock: false
reviews_count: 8
category: "Hi"
url: https://www.desertcart.fi/products/13337170-koolermax-ar-125-6-stage-ro-di-aquarium-drinking-water
store_origin: FI
region: Finland
---

# Koolermax AR-125 6-stage RO+DI Aquarium Drinking water RO system 80 to 120 GPD New complete 2 outputs

**Brand:** koolermax
**Price:** € 493.09
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** Koolermax AR-125 6-stage RO+DI Aquarium Drinking water RO system 80 to 120 GPD New complete 2 outputs by koolermax
- **How much does it cost?** € 493.09 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/13337170-koolermax-ar-125-6-stage-ro-di-aquarium-drinking-water)

## Best For

- koolermax enthusiasts

## Why This Product

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

## Description

This Koolermax RO system will purify your tap water into clean, good tasting water and ultra pure water for Aquarium. 2 outputs, one for drinking and one for Aquarium. We have been making RO systems in USA for 18 years. Our systems are reliable and guaranty to perform. 6-stage 80 to 120 gallons per day depends on water pressure. 1 year warranty. The system come complete with all filters and membrane, pressure tank, EURO style dispensing faucet, pressure gauge, tubing, installation hardware, Free tech support. * 1st stage 5 micron sediment filter removes rust, sand, dirt, sediment from water * 2nd stage coconut shell activated carbon block filter removes chlorine, chloramines, odor * 3rd stage same as 2nd stage to ensure 100% removal rate of chlorine * 4th stage 120GPD reverse osmosis membrane removes up to 98% of contaminants and dissolved minerals * 5th stage inline carbon filter improves the taste of water for drinking * 6th stage DI filter to further reduce the minerals for aquarium or other applications. Dimension: RO unit 16 in x 16 in x 6 in, tank 10 in Dia x 15 in. We also have larger size tanks. You can call us directly if you have questions about this system 1-888-633-7972 (9am to 4:30pm PST)

## Features

- Koolermax 6-stage dual output RO+DO Aquarium Drinking water RO system, 120GPD
- The system come with RO unit, pressure tank, dispensing faucet, all filters, installation hardware
- auto-shut-off when the tank is full, high capacity filters.
- pressure gauge included, reads operating pressure and know when to replace the bottom 3 filters
- Assembled in USA with NSF and FDA approved components, tank holds 2 gallons, larger tank available
- ›See more product details

## Images

![Koolermax AR-125 6-stage RO+DI Aquarium Drinking water RO system 80 to 120 GPD New complete 2 outputs - Image 1](https://images-na.ssl-images-amazon.com/images/I/41Z39Nwkm9L.jpg)
![Koolermax AR-125 6-stage RO+DI Aquarium Drinking water RO system 80 to 120 GPD New complete 2 outputs - Image 2](https://images-na.ssl-images-amazon.com/images/I/51jBDL4BjZL.jpg)
![Koolermax AR-125 6-stage RO+DI Aquarium Drinking water RO system 80 to 120 GPD New complete 2 outputs - Image 3](https://images-na.ssl-images-amazon.com/images/I/51gWNHW8IgL.jpg)
![Koolermax AR-125 6-stage RO+DI Aquarium Drinking water RO system 80 to 120 GPD New complete 2 outputs - Image 4](https://images-na.ssl-images-amazon.com/images/I/51blG49jLcL.jpg)
![Koolermax AR-125 6-stage RO+DI Aquarium Drinking water RO system 80 to 120 GPD New complete 2 outputs - Image 5](https://images-na.ssl-images-amazon.com/images/I/31UYqCZvpGL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐ Great price, product and customer service!
            
*by A***R on August 28, 2017*

First off, I have NEVER owned or installed an RODI system.  Only have read and YouTubed it.  I am NOT handy at all.  If I can do it, anyone can!Received my the Koolermax AR-125.  Installation was simple, and instructions were easy to read.  Item was received one day early from due date (shipped from Anaheim to Georgia) and were packaged securely.I made 5 gallons of RODI in less that 20 minutes and it reads my water pressure at 68.TDS prior to installation was 139.  RO TDS from the spigot reads 25.  After DI TDS is 0.  Drinking water is much better tasting than what we get with the faucet filters (Pure) and pitcher filters we have (Brita).I only have a couple of issues:First, the tubing as well as the ON/OFF switch for the DI out are missing.  They are listed on the instruction checklist.The second is that we have a slow (1 drop every 2.5 seconds) leak from the feed tubing that is connected to the water adapter.Also, the instructions mentions sleeves but there is no mention of it in the items checklist.  Although it hasn't led to any leaks though.I have reached out Koolermax and will update this review in regards to their customer support.Update:  I received an email stating that they would ship replacement parts for the tube and ball valve but asked me to call technical support in regards to the leak.  I work during customer service hours I wasn't able to call until the end of the week.  When I called they informed me that they already sent all replacement parts except the fitting that was leaking.Technical support walked me through some steps to ensure it was installed correctly and then told me they would be sending me a replacement brass fitting.All in all, very happy with my purchase and the great customer service.  I would recommend this product to anyone looking for an RO drinking faucet and DI for their aquarium.
  

### ⭐⭐⭐⭐ Almost there but not quite
            
*by T***S on December 1, 2016*

The install instructions leave a bit to be desired and the kit did not come with a water line or ball valve for the DI output (it's a two output system right?)  But it looks to be quality stuff from a good company.  Not actually using it for my aquarium yet since the DI output is not providing 0 TDS water.  I wonder if it really needs the second stage of DI that the AR-122 version is equipped with?  I'll probably order another DI filter from Koolermax and plumb it in series with the one that the AR-125 is equipped with.
  

### ⭐⭐⭐⭐ Installation was easy, however it was not due to the directions
            
*by M***Y on March 11, 2017*

Installation was easy, however it was not due to the directions.It's a good starter unit, it takes my tap water from 78 ppm to 8 ppm before the DI filter.
  

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.fi/products/13337170-koolermax-ar-125-6-stage-ro-di-aquarium-drinking-water](https://www.desertcart.fi/products/13337170-koolermax-ar-125-6-stage-ro-di-aquarium-drinking-water)

---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-27*