--- product_id: 13890748 title: "Koolermax AR-122 6-stage RO+DI Aquarium Reef Reverse Osmosis Water System 150 GPD New Complete" brand: "koolermax" price: "S$357" currency: SGD in_stock: true reviews_count: 8 url: https://www.desertcart.sg/products/13890748-koolermax-ar-122-6-stage-ro-di-aquarium-reef-reverse store_origin: SG region: Singapore --- # 150 GPD capacity 6-stage filtration Made in USA Koolermax AR-122 6-stage RO+DI Aquarium Reef Reverse Osmosis Water System 150 GPD New Complete **Brand:** koolermax **Price:** S$357 **Availability:** ✅ In Stock ## Summary > 💦 Dive into purity with the AR-122! ## Quick Answers - **What is this?** Koolermax AR-122 6-stage RO+DI Aquarium Reef Reverse Osmosis Water System 150 GPD New Complete by koolermax - **How much does it cost?** S$357 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/13890748-koolermax-ar-122-6-stage-ro-di-aquarium-reef-reverse) ## 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 - • **Trusted Quality:** Over 23 years of reliable performance from Koolermax. - • **Easy Installation:** Comes with everything you need for a hassle-free setup. - • **Multi-Stage Mastery:** 6 stages of filtration ensure top-notch water quality. - • **Pure Water, Pure Life:** Experience ultra-pure water for your aquarium and hydroponics! - • **High Capacity Performance:** Generates up to 120 gallons per day for all your needs. ## Overview The AR-122 6-stage RO+DI Aquarium Reef Reverse Osmosis Water System is designed for enthusiasts seeking ultra-pure water for aquariums, hydroponics, and more. With a high capacity of 150 GPD and a comprehensive 6-stage filtration process, this system ensures optimal water quality. Complete with all necessary components for easy installation, it embodies over 23 years of trusted performance from Koolermax, proudly made in the USA. ## Description AR-122 6-stage RO+DI Aquarium Reef Reverse Osmosis Water System 150 GPD New Complete ## 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 | |---------------|-------| | Brand | Koolermax | | Special Feature | Multi Stage Filtration, Chlorine Reduction, Reduce TDS | | Package Information | Tube | | Installation Type | Under Sink | | Power Source | Adapter | | Item Weight | 17 Pounds | | Model Name | AR - 122 | | Upper Temperature Rating | 1E+2 Degrees Fahrenheit | | UPC | 784672794787 | | Manufacturer | Koolermax | | Part Number | AR-122 | | Item Weight | 17 pounds | | Product Dimensions | 16 x 6 x 16 inches | | Item model number | AR-122 | | Is Discontinued By Manufacturer | No | | Color | Multicolor | | Item Package Quantity | 1 | | Capacity Description | 80 | | Special Features | Multi Stage Filtration, Chlorine Reduction, Reduce TDS | | Batteries Included? | No | | Batteries Required? | No | ## Product Details - **Brand:** Koolermax - **Product Dimensions:** 16"L x 5.5"W x 16"H - **Package Information:** Tube - **Installation Type:** Under Sink - **Power Source:** Adapter - **Item Weight:** 17 Pounds - **Model Name:** AR - 122 - **Upper Temperature Rating:** 1E+2 Degrees Fahrenheit - **UPC:** 784672794787 - **Manufacturer:** Koolermax ## Images ![Koolermax 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/81rAYSDf6yL.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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ 6 Stage RODI, saving me $$ even on a well! *by R***. on December 14, 2023* I bought this 6 Stage RODI in hopes that I could save the 3 hr weekly round trip to the "Local Fish Store". I have a large saltwater aquarium and a weekly water change is not only important, it's a necessity!!Besides of saving me the time and cost of the weekly trip my testing of the RODI water from my LFS and from this RODI unit proved that this was a wise investment. TDS of the LFS water was running between 15 and 35 ppm. I've now made over 100 gallons of RODI water and the TDS of the water from this RODI system is always ZERO!!For my saltwater reefer friends...this was recommended to me by another reefer online. I'M SOOO GLAD I TOOK HIS ADVICE!!I'll be honest, I'm fairly handy, but plumbing isn't my strong suit. However, installation was a breeze due to the excellent instructions.I HIGHLY RECOMMEND THIS RODI SYSTEM!NOTE: another reviewer said, "Update: buying from koolermax/filter direct has a high shipping charge and it is hard to find anywhere else. Thought I could get a standard size but nope... this is the printer pricing scheme all over with the system being a loss leader I think. Im considering getting a different RODI for standard sizes."This is NOT TRUE. The AR-122 uses standard filter sizes. I purchase all filters and DI resin via Amazon sellers. Everything is standard and no special sizes are needed. ### ⭐⭐⭐⭐⭐ Great inexpensive RO/DI unit! *by S***L on March 6, 2017* Received about a month ago. Spent a little time making sure all the fittings were tight and had to stop and re-tighten in a few places before I could say it was "leak free". Once I got it to this point, it has not leaked.I bought a top-off float, and I have been able to verify that if the float is up the unit stops making water. I don't have it hooked up to a permanent water supply; I turn the water off when I am not using it or if I am not home so I am not 100% sure the float will do its job to stop the water -- I can only expect that it will -- but the ASOV does work if I manually lift the float. I did spring a leak where one hose blew, but I'm sure I didn't have it seated correctly. You MUST be sure to push the tubing in twice and make sure it is seated correctly. Giving a little tug should let you know you've got it right. Once I put the tubing back in, I have not seen another leak in almost a month.Water coming out is at zero TDS. Can't beat that. My only complaint with this unit is, if you download the PDFs from the manufacturer, both the "general" hookup pamphlet and the AR-122 pamphlet are set up to be one page, so it is very difficult to print, and it is even difficult to read on a laptop. Otherwise, it's a great unit and an excellent value for the money. I would recommend this to anyone who is looking at 6-stage RO/DI units and not willing to pay $300+ (like me). ### ⭐⭐⭐⭐⭐ Buy it now! Seriously, best value for the money! *by T***. on June 24, 2019* If you are looking for an awesome unit, that you don’t have to break the bank for, this unit is FN amazing! Right now I’m running it off my garden hose cuz my sink faucets aren’t compatible (Moen sucks) until a friend comes to install it in my laundry room. ZERO TDS and going strong! I have a small freshwater tank and 2 saltwater tanks so this was a needed buy cuz I was tired of lugging Lowe’s buckets back and forth to the fish store! Now I have more money and time for other things since that saltwater can get pricey! The directions weren’t the best, so if you are a first timer to RO/DI units just check out some YouTube videos on setup and flushing the RO before you hook up the DI. It took me about 1.5 hours to flush, and fill 6 buckets. If a newbie, get a Brute trash can with the kid to start your own water and mixing station! Cheaper cans can have a bad effect on the water quality. ## 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 --- ## 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.sg/products/13890748-koolermax-ar-122-6-stage-ro-di-aquarium-reef-reverse](https://www.desertcart.sg/products/13890748-koolermax-ar-122-6-stage-ro-di-aquarium-reef-reverse) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-05-13*