The store will not work correctly in the case when cookies are disabled.
Bulk Reef Supply Saltwater Logo
Bulk Reef Supply Freshwater Logo

FREE Shipping Over $49

Free Shipping

Orders Over $49 Ship Free

$5.99 economy shipping on orders under $49

Learn More
| Earn Reward Points
Skip to Content
Menu BRS Freshwater
My Cart
    • My Account
    • My Wish List
    • My Orders
    • Address Book
    • Sign Out
    • Reward Points
  • Sign In
Bulk Reef Supply Mobile Menu
Close

Quick Links

  • Deals
  • Gift Cards
  • What's New
  • Education
  • Clearance
  • Open Box
  • PR Rewards
  • Shop Brands
  • FAQs
  • Saltwater
Menu
Fast Shipping Fast Shipping
Sign up to be a Reward Member Earn Reward Points
Returns 365-Day Returns
Experts Aquarium Experts
  • Fast Shipping Fast Shipping
  • Sign up to be a Reward Member Earn Reward Points
  • Returns Risk-Free 365 Day Returns
  • Experts Aquarium Experts
Loading...
Bulk Reef Supply

BRS 4 Stage Reverse Osmosis System - 75GPD

In stock
Out of stock
SKU
200416
Be the first to review this product
$143.99 $179.99

- +
Add to Wish List
Risk Free 365 Returns

Your Satisfaction Guaranteed With
365 Day Risk Free Returns

No longer need what you ordered? Ordered one too many? We've got your back.


Return new, unopened products in original packaging within 365 days for a full refund.

Under 60 days? No problem. We’ll issue your refund to the original form of payment. Over 60 days? Still no problem. We'll issue your refund in the form of store credit, which you can use like cash on our website.


Return unused, open box products within 30 days.

Open box but still unused? We can help. We’ll issue your refund to the original form of payment minus a small 10% restocking and handling fee.

Some exclusions apply, for more information go to Return & Replacement Details.

Skip to the end of the images gallery
main product photo
Skip to the beginning of the images gallery
Details

Elevate Your Aquarium's Water Quality with BRS RO Systems

  • Removes Chlorine & Other Contaminants
  • High Quality Filters Included
  • 75 Gallon Per Day Membrane
  • Up to 99% Rejection Rate
  • Source & Drain Fittings Included
  • Limited Lifetime Warranty

 

BRS RO Systems are compact, upgradeable, and most importantly, affordable. With upgraded filters and fittings vs the "budget" systems, it's easy to see why BRS RO Systems have been used by so many aquarium hobbyists over the years.

 

4 Stages of Filtration

 

Sediment Filter: Stage 1 is the first pre-filter in the system and the first line of defense to remove particles 5 microns and larger from the source water.

Chlorine & VOC Carbon Block Filter: Stage 2 is the first of the two carbon blocks that come pre-installed in the system. This filter is particularly good at removing chlorine. If your source water contains chloramines, we suggest swapping this filter out for a BRS Universal Carbon Block. 

Universal Carbon Block: The Universal Carbon Block is the last pre-filter before the water flows to the RO Membrane. BRS Universal Carbon Blocks have been specially formulated for industry leading chloramine and chlorine reduction. Quite simply, this is the best carbon block we sell. 

RO Membrane: This RO system utilizes a top quality 75 GPD DOW Filmtec Membrane. This is the industry standard for high performing reverse osmosis membranes and has a rejection rate of up to 99% at peak performance. 

 

 

What's Included?

4 Stage RO System

Pre-Installed Filters

10’ Red ¼” Tubing

10’ Blue ¼” Tubing

10’ Black ¼” Tubing

Parts Bag w/ Source & Drain Fittings

Filter Wrench

Limited Lifetime Warranty

More Information
More Information
SKU 200416
Aquarium Type Saltwater, Freshwater
Stages 4 Stage
Production Rate 75 Gallons per Day
Waste:Product Water Standard (3:1)
Dimensions 16" x 6.25" x 15.5"
Filter Dimensions 10 in. x 2.5 in. (Standard)
Tubing Length 10 Ft each of 1/4" blue, red and black tubing
Included Filters Sediment Filter, Carbon Block, 2nd Carbon Block, RO Membrane
Included Accessories Inline Ball Valve, EZ Angle Stop Adapter, Saddle Clamp
Warranty BRS Limited Lifetime Warranty
Carbon Block Type Chloramines/Universal, Chlorine
Sediment Filter Type True Gradient Technology
Membrane GPD 75
Micron Rating 1, 5
Water Supply Connections Garden Hose / Laundry Tub, Under Sink Adapter
Reviews 13
Write Your Own Review
You're reviewing:BRS 4 Stage Reverse Osmosis System - 75GPD
Your Rating
Product Questions

Product Questions

Does this kit include a flow restrictor? Did not see it listed in the parts list. Thanks.
Question by: Dustin on Jan 6, 2020, 6:55 PM
0
Great question! This would have a flow restrictor, but not one the contains a flush valve.
Answer by: Nick Gansen on Jan 7, 2020, 3:35 PM
0
Hello what is difference between stage 4&5? Can this water be used as reef tank top off with no nitrates?
Question by: Matt on May 7, 2017, 12:51 PM
0
Hey there,
The 5 stage system provides dual carbon blocks, which may be an advantage for cities using higher levels off disinfectants such as chloramine, but where TDS and general water quality is moderate and a dual DI resin stage is not needed or wanted. This ensures that there is minimal pass-through at normal production rates and this protects the membrane and keeps it running in peak shape. The membrane will remove upwards of 85% of nitrate from your tap water, and any residual nitrate will be removed by the DI stage.

Hope this helps!
Answer by: Zack on May 10, 2017, 11:43 AM
0
Do you have a RO only system that does 150 gpd.
Question by: Kenneth Burch on Jan 18, 2017, 10:23 PM
0
Hey there! We do not currently sell a 150GPD RO only unit, however we do carry the 150GPD upgrade kit that you can purchase separately and install. :-)
Answer by: Randy on Jan 20, 2017, 11:26 AM
0
The flow of water is very low. What could be the problem and how to fix that?
Question by: Arthur Lee on May 17, 2016, 4:15 PM
0
Great question!
The flow will come out at a steady trickle into very slow stream. For trouble shooting you will want to contact our customer service team directly. Feel free to let us know if you have any further questions!
Answer by: Connor on May 18, 2016, 6:17 PM
0
How often do you have to replace the 3 filters? I've had mine for a few months now and the filters are darker.
Question by: Adam on Mar 31, 2016, 4:11 PM
0
Great question!
Ideally the 3 filters should be changed when the TDS on the DI resin is above 0. Typically this is between 6-9 months and sometimes as late as 12 months. Feel free to let us know if you have any further questions!
Answer by: Connor on Apr 5, 2016, 4:02 PM
0
What is the waste water to filtered water ratio? It seems that there is a lot of waste water.
Question by: Chris Chalmers on Mar 24, 2016, 1:04 PM
0
Great question!
The ratio of waste to product water is 4:1 (4 parts waste to 1 part product water) This will vary of course depending on the pressure and quality of the incoming water. Feel free to let us know if you have any further questions!
Answer by: Connor on Mar 24, 2016, 1:35 PM
0

SIGN UP FOR THE BULK REEF SUPPLY NEWSLETTER

Don’t be the last to know this holiday season about sales, specials, new products, and more!

Sign Up Now
BRS Fresh https://media2.cdn.bulkreefsupply.com/media/logo/stores/1/BRS-Logo-498x174.png https://fresh.bulkreefsupply.com/
BRS Fresh Bulk Reef Supply
  • Facebook Opens a new window
  • Youtube Opens a new window
  • Instagram Opens a new window
  • TikTok Opens a new window

Contact

  • 763-432-9691

  • 8am - 6pm CT M-Th
    9am - 4pm CT Friday
  • support@bulkreefsupply.com
  • 6325 Sandburg Road, Suite 200
    Golden Valley, MN 55427 US

Bulk Reef Supply
About Us
Customer Service
Careers
Wholesale Customers
Instructions
Terms & Conditions
Customer Center
Preferred Reefer Program
International Shipping
Returns & Replacements
Payment, Pricing & Promos
Shipping & Delivery
APL Star Logo
© 2025 Aperture Pet & Life. All Rights Reserved.
Privacy Policy

item(s) Added to Your Cart

Product Name

View Cart Checkout Now
You may also like
Alder Cones 25ct
Liquid Gardens
Alder Cones 25ct
$8.50 $8.50

Dual-Sided Substrate Shovel (12.6 inch)
Fluval
Dual-Sided Substrate Shovel (12.6 inch)
$11.49 $11.49

Betta World - Mini Lava Rock (1lb)
Aqua Natural
Betta World - Mini Lava Rock (1lb)
$6.36 $7.48

Stainless Steel Curved Fine Tip Pinsettes
Ultum Nature Systems
Stainless Steel Curved Fine Tip Pinsettes
From: $29.99

Choose Options
Anubias Nana on Driftwood - Live Freshwater Plant
AquaZen
Anubias Nana on Driftwood - Live Freshwater Plant
$17.99 $17.99

African Cichlid Mix - Ivory Coast Sand 20lbs
CaribSea
African Cichlid Mix - Ivory Coast Sand 20lbs
$15.40 $15.40

Super Naturals Substrate - Gemstone Creek
CaribSea
Super Naturals Substrate - Gemstone Creek
Rating:
100%
1 Review
From: $13.32

Choose Options
Catappa Leaves 10ct
Liquid Gardens
Catappa Leaves 10ct
$10.00 $10.00

Plant Tongs
Eheim
Plant Tongs
From: $21.99

Choose Options
Hardness Test Kit
NT Labs
Hardness Test Kit
Rating:
100%
1 Review
$11.42 $11.42

Login and Registration Form

  • Login
  • Register

Registered Customers
If you have an account, sign in with your email address.
Forgot Your Password?
or

Login with Your Social Profile Login with
Continue with Google
Continue with Facebook
Continue with Apple

Personal Information
Sign-in Information
Password Strength: No Password
Back
or

Login with Your Social Profile Login with
Continue with Google
Continue with Facebook
Continue with Apple
  • Forgot Your Password?

Please enter your email address below to receive a password reset link.
Go back