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Charterhouse Aquatics
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Collection: Reverse Osmosis

Reverse osmosis will purify water and remove salts and other impurities from your source water. Using good quality RO water is an essential foundation block and will get set your aquarium up for success from the start! 

Reverse osmosis will purify water and remove salts and other impurities from your source water. Using good quality RO water is an essential foundation block and will get set your aquarium up for success from the start! 

Read more...

RO Units

RO Sediment and Carbon Cartridges

DI Resins

RO Membranes

RO Tubing

TDS Meters

Home /Aquatics / Filtration / Reverse Osmosis
What Our Customers Are Saying About Us
Excellent
Based on 882 Reviews
User Image
Steve sayfritz
July 25, 2025
another great service
User Image
Steve Brailsford
July 25, 2025
Great products, well priced, but best of all is there customer service, almost instant and so helpful and friendly - They can take my money anytime 😀
User Image
Debs Chincharo
July 23, 2025
Fantastic in every way. Had a leaking filter & Needed a replacement urgently. Telephoned with a few questions. Gentleman were very knowledgable, patient and friendly. Advise offered was welcomed.👌 Next day delivery guaranteed as ordering before 4pm. Arrived next morning DPD. Thank you Charterhouse. Fantastic all round service. Will not think about shopping anywhere else again. 👌👌💫💫💫
User Image
P Opus
July 23, 2025
Excellent compay to deal with. Manufacturer messed up on one of the components in our order and Marcus sorted it out with the minimum of disruption to us.
User Image
Chris D
July 22, 2025
Can’t fault them! Great communication, competitive pricing and delivery’s always on time! Never had an issue in the many years I’ve been using them
User Image
Nick Wadland
July 22, 2025
5star service
User Image
Matthew
July 22, 2025
Great place to order from well packaged and fast delivery
User Image
rob lawton
July 21, 2025
Excellent company to deal with and was update all the way through delivery Will definitely use these again
User Image
Antony Dodds
July 21, 2025
Fast delivery of a excellent product. With service like this it's impossible to have issues
User Image
Jason Holding
July 20, 2025
Swift
User Image
malcolm fleury
July 19, 2025
Great driver, took extra care parcel was left safely
User Image
Kevin Brewer
July 19, 2025
Use Charterhouse Aq for most of our fish related items, always a super service.
User Image
John Brierley
July 16, 2025
new ato by d/d and red sea complete reef care all arrived safe and sound ..will be doing a lot more trade with these guys very willing to help .
User Image
Jenny Macro
July 15, 2025
Item (pond hose) arrived promptly and was given good notification of both despatch and delivery. It was also well packaged.
User Image
john kelly
July 15, 2025
Good communications and attentive to what I was looking for. Very helpful.
User Image
lisa Burnett
July 14, 2025
Excellent service and great value for money. Order was delivered quickly. Will definitely be going back. Very user friendly website
User Image
Steve
July 12, 2025
Arrived exactly when expected everything well packed and in good order.
User Image
Enzo Colantuono
July 12, 2025
Well delivered. Friendly driver. Tank was well packed. Seller kept me informed on despatch progress. One screw missing but that’s on the manufacturer.
User Image
archie burns
July 8, 2025
Good price and prompt delivery
User Image
Señorita Stefania
July 8, 2025
I’ve ordered a ciano 15 it’s so nice
User Image
Steve sayfritz
July 25, 2025
another great service
User Image
Steve Brailsford
July 25, 2025
Great products, well priced, but best of all is there customer service, almost instant and so helpful and friendly - They can take my money anytime 😀
User Image
Debs Chincharo
July 23, 2025
Fantastic in every way. Had a leaking filter & Needed a replacement urgently. Telephoned with a few questions. Gentleman were very knowledgable, patient and friendly. Advise offered was welcomed.👌 Next day delivery guaranteed as ordering before 4pm. Arrived next morning DPD. Thank you Charterhouse. Fantastic all round service. Will not think about shopping anywhere else again. 👌👌💫💫💫
User Image
P Opus
July 23, 2025
Excellent compay to deal with. Manufacturer messed up on one of the components in our order and Marcus sorted it out with the minimum of disruption to us.
User Image
Chris D
July 22, 2025
Can’t fault them! Great communication, competitive pricing and delivery’s always on time! Never had an issue in the many years I’ve been using them
User Image
Nick Wadland
July 22, 2025
5star service
User Image
Matthew
July 22, 2025
Great place to order from well packaged and fast delivery
User Image
rob lawton
July 21, 2025
Excellent company to deal with and was update all the way through delivery Will definitely use these again
User Image
Antony Dodds
July 21, 2025
Fast delivery of a excellent product. With service like this it's impossible to have issues
User Image
Jason Holding
July 20, 2025
Swift
User Image
malcolm fleury
July 19, 2025
Great driver, took extra care parcel was left safely
User Image
Kevin Brewer
July 19, 2025
Use Charterhouse Aq for most of our fish related items, always a super service.
User Image
John Brierley
July 16, 2025
new ato by d/d and red sea complete reef care all arrived safe and sound ..will be doing a lot more trade with these guys very willing to help .
User Image
Jenny Macro
July 15, 2025
Item (pond hose) arrived promptly and was given good notification of both despatch and delivery. It was also well packaged.
User Image
john kelly
July 15, 2025
Good communications and attentive to what I was looking for. Very helpful.
User Image
lisa Burnett
July 14, 2025
Excellent service and great value for money. Order was delivered quickly. Will definitely be going back. Very user friendly website
User Image
Steve
July 12, 2025
Arrived exactly when expected everything well packed and in good order.
User Image
Enzo Colantuono
July 12, 2025
Well delivered. Friendly driver. Tank was well packed. Seller kept me informed on despatch progress. One screw missing but that’s on the manufacturer.
User Image
archie burns
July 8, 2025
Good price and prompt delivery
User Image
Señorita Stefania
July 8, 2025
I’ve ordered a ciano 15 it’s so nice
User Image
Steve sayfritz
July 25, 2025
another great service
User Image
Steve Brailsford
July 25, 2025
Great products, well priced, but best of all is there customer service, almost instant and so helpful and friendly - They can take my money anytime 😀
User Image
Debs Chincharo
July 23, 2025
Fantastic in every way. Had a leaking filter & Needed a replacement urgently. Telephoned with a few questions. Gentleman were very knowledgable, patient and friendly. Advise offered was welcomed.👌 Next day delivery guaranteed as ordering before 4pm. Arrived next morning DPD. Thank you Charterhouse. Fantastic all round service. Will not think about shopping anywhere else again. 👌👌💫💫💫
User Image
P Opus
July 23, 2025
Excellent compay to deal with. Manufacturer messed up on one of the components in our order and Marcus sorted it out with the minimum of disruption to us.
User Image
Chris D
July 22, 2025
Can’t fault them! Great communication, competitive pricing and delivery’s always on time! Never had an issue in the many years I’ve been using them
User Image
Nick Wadland
July 22, 2025
5star service
User Image
Matthew
July 22, 2025
Great place to order from well packaged and fast delivery
User Image
rob lawton
July 21, 2025
Excellent company to deal with and was update all the way through delivery Will definitely use these again
User Image
Antony Dodds
July 21, 2025
Fast delivery of a excellent product. With service like this it's impossible to have issues
User Image
Jason Holding
July 20, 2025
Swift
User Image
malcolm fleury
July 19, 2025
Great driver, took extra care parcel was left safely
User Image
Kevin Brewer
July 19, 2025
Use Charterhouse Aq for most of our fish related items, always a super service.
User Image
John Brierley
July 16, 2025
new ato by d/d and red sea complete reef care all arrived safe and sound ..will be doing a lot more trade with these guys very willing to help .
User Image
Jenny Macro
July 15, 2025
Item (pond hose) arrived promptly and was given good notification of both despatch and delivery. It was also well packaged.
User Image
john kelly
July 15, 2025
Good communications and attentive to what I was looking for. Very helpful.
User Image
lisa Burnett
July 14, 2025
Excellent service and great value for money. Order was delivered quickly. Will definitely be going back. Very user friendly website
User Image
Steve
July 12, 2025
Arrived exactly when expected everything well packed and in good order.
User Image
Enzo Colantuono
July 12, 2025
Well delivered. Friendly driver. Tank was well packed. Seller kept me informed on despatch progress. One screw missing but that’s on the manufacturer.
User Image
archie burns
July 8, 2025
Good price and prompt delivery
User Image
Señorita Stefania
July 8, 2025
I’ve ordered a ciano 15 it’s so nice

Why buy from Charterhouse?

Free Shipping Over £50

Spend over £50 on your order and qualify for free shipping.

Flexible Payment Options

We offer flexible monthly finance options.

Charterhouse Points

As a thank you, we run the Charterhouse Points scheme.

Subscribe & Save

Takes the hassle out of regular ordering.

Free Shipping Over £50

Spend over £50 on your order and qualify for free shipping.

Flexible Payment Options

We offer flexible monthly finance options.

Charterhouse Points

As a thank you, we run the Charterhouse Points scheme.

Subscribe & Save

Takes the hassle out of regular ordering.

About Us

At Charterhouse Aquatics we stock the largest range of aquarium dry goods in the UK. We have full design, installation and maintenance services.

Address: 14 Merchant Drive, Mead Lane, Hertford, SG13 7AY

Telephone: 0203 697 3750
Company Number: 02872980
VAT Number: 854458301

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