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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 804 Reviews
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Louise Adams
June 8, 2025
Excellent service and fast delivery
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Darren Southall
June 8, 2025
Great items delivered quickly
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TheGray1967
June 7, 2025
Great service, couldn’t of been more helpful Fast service & delivery
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Brian Powell
June 7, 2025
Good service👍
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Craig Smart
June 7, 2025
Cheap prices and fast delivery
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Jason O'Brien
June 7, 2025
Never had a bad experience with them. Super easy to deal with, great prices and fast delivery
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Nathan Jenkins
June 5, 2025
Ordered my fish tank from them. Excellent service definitely recommend
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John Garrett
June 3, 2025
excellent service
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Nicky Bowden
June 3, 2025
Excellant service thankyou
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Micheal Jane
June 2, 2025
Supper prompt delivery,as always.
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TEE'S REEF
June 2, 2025
bang on fast sevice
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Angela Cole
June 2, 2025
Excellent prices and speedy delivery. Highly recommended 👌
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Alan Marks
June 2, 2025
Great price and excellent service what mopre can you ask for
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paul wells
June 2, 2025
Quick prompt delivery and was notified every step of the way , thank you so much.
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Paul Williams
June 2, 2025
Fantastic communication, quick delivery, and excellent product would highly recommend.
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bloomf1
June 1, 2025
Well packaged
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Daniel Lang
June 1, 2025
Super fast delivery and great communication throughout.
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Andy Legge
June 1, 2025
Top notch, delivered on time, great product.
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Angela Butland
May 24, 2025
Great service and product
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Anthony Lofthouse
May 24, 2025
used before fantastic service

Why buy from Charterhouse?

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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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© 2025, Charterhouse Technology Ltd

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TMC V2Pure Active Carbon Block Filter
TMC V2Pure Active Carbon Block Filter
2 Reviews
Get it by tomorrow, June 10th
£7.69
TMC V2Pure Sediment Cartridge Filter
TMC V2Pure Sediment Cartridge Filter
3 Reviews
Get it by tomorrow, June 10th
£4.24
Glamorca Deionization Filter
Glamorca Deionization Filter
6 Reviews
Get it by tomorrow, June 10th
£22.99
TMC V2Pure 50 Reverse Osmosis System
TMC V2Pure 50 Reverse Osmosis System
Get it by tomorrow, June 10th
£99.99
TMC V2Pure 100 Advanced RO System (inc TDS)
TMC V2Pure 100 Advanced RO System (inc TDS)
Get it by tomorrow, June 10th
£152.99
Glamorca RO Unit Glamorca RO Unit
Glamorca RO Unit
8 Reviews
Get it by tomorrow, June 10th
£329.99
Glamorca Membrane Filter
Glamorca Membrane Filter
1 Review
Get it by tomorrow, June 10th
£69.99
TMC V2Pure De-Ionisation Pod (500ml) inc Resin
TMC V2Pure De-Ionisation Pod (500ml) inc Resin
9 Reviews
Get it by tomorrow, June 10th
£20
TMC V2Pure 50 Advanced RO System (inc TDS)
TMC V2Pure 50 Advanced RO System (inc TDS)
Get it by tomorrow, June 10th
£135.99
TMC v2Pure 360 Advanced RO System
TMC v2Pure 360 Advanced RO System
Get it by tomorrow, June 10th
£291.05
Aqua-Medic Easy Line Professional RO 50GPD
Aqua-Medic Easy Line Professional RO 50GPD
Get it by tomorrow, June 10th
£85.03
Glamorca Carbon Block Filter
Glamorca Carbon Block Filter
2 Reviews
Get it by tomorrow, June 10th
£12.99
Glamorca Sediment Filter
Glamorca Sediment Filter
1 Review
Get it by tomorrow, June 10th
£10.99
Charterhouse RO Membrane 100 GPD Charterhouse RO Membrane 100 GPD
Charterhouse RO Membrane 100 GPD
Get it by tomorrow, June 10th
£31.95
D-D 10" Replacement Sediment Filter Cartridge (50/75/125)
D-D 10" Replacement Sediment Filter Cartridge (50/75/125)
Get it by tomorrow, June 10th
£3.99
Charterhouse RO Membrane 75 GPD Charterhouse RO Membrane 75 GPD
Charterhouse RO Membrane 75 GPD
Get it by tomorrow, June 10th
£26.95
Charterhouse Reverse Osmosis DI Pod & Media
Charterhouse Reverse Osmosis DI Pod & Media
Get it by tomorrow, June 10th
£21.95
Triton DI (1 Litre)
Triton DI (1 Litre)
Get it by tomorrow, June 10th
£11.75
TMC V2Pure 50 Replacement RO Membrane
TMC V2Pure 50 Replacement RO Membrane
6 Reviews
Get it by tomorrow, June 10th
£31
Glamorca Activated Carbon Filter
Glamorca Activated Carbon Filter
2 Reviews
Get it by tomorrow, June 10th
£11.99
D-D 10" Replacement Block Carbon Cartridge (50/75/125)
D-D 10" Replacement Block Carbon Cartridge (50/75/125)
Get it by tomorrow, June 10th
£6.99
Pressure Gauge for RO Unit
Pressure Gauge for RO Unit
1 Review
Get it by tomorrow, June 10th
£8.50
Vyair RO Tubing - White (1m)
Vyair RO Tubing - White (1m)
Get it by tomorrow, June 10th
£0.80
RO Shut Off Tap for 1/4" RO Tube
RO Shut Off Tap for 1/4" RO Tube
Get it by tomorrow, June 10th
£4.99
Auto Aqua Titanium One Digital TDS Meter
Auto Aqua Titanium One Digital TDS Meter
1 Review
Get it by tomorrow, June 10th
£22.99
TMC V2Pure 100 Replacement RO Membrane
TMC V2Pure 100 Replacement RO Membrane
2 Reviews
Get it by tomorrow, June 10th
£48.44
Korallen Zucht Hi Quality DI Resin 1L
Korallen Zucht Hi Quality DI Resin 1L
4 Reviews
Get it by tomorrow, June 10th
£24.99
Triton DI (5 Litre)
Triton DI (5 Litre)
Dispatch in 4-5 days
£53
Vyair RO Tubing - Red (1m)
Vyair RO Tubing - Red (1m)
1 Review
Get it by tomorrow, June 10th
£0.80
Charterhouse RO Membrane 50 GPD Charterhouse RO Membrane 50 GPD
Charterhouse RO Membrane 50 GPD
Get it by tomorrow, June 10th
£23.95
TMC V2Pure 75 Replacement RO Membrane
TMC V2Pure 75 Replacement RO Membrane
Get it by tomorrow, June 10th
£42.68
Aqua Medic Premium Line 600 RO System
Aqua Medic Premium Line 600 RO System
Dispatch in 7-14 days
£205.91
Modern Reef ION-X B 5.5L
Modern Reef ION-X B 5.5L
Get it by tomorrow, June 10th
£99.99
Modern Reef ION-X B 2L
Modern Reef ION-X B 2L
Get it by tomorrow, June 10th
£44.99
Modern Reef ION-X A 2L
Modern Reef ION-X A 2L
Dispatch in 5-10 days
£34.99
Nyos Aqua Pure 1000ml
Nyos Aqua Pure 1000ml
Dispatch in 5-10 days
£25.49
Auto Aqua Titanium S3 Triple Digital TDS Meter
Auto Aqua Titanium S3 Triple Digital TDS Meter
Get it by tomorrow, June 10th
£48.99
Aqua Medic Mini UV-RO UVC Steriliser
Aqua Medic Mini UV-RO UVC Steriliser
Get it by tomorrow, June 10th
£68.94
Aqua Medic Premium Line 190 RO System
Aqua Medic Premium Line 190 RO System
Get it by tomorrow, June 10th
£158.48
Aqua Medic Premium Line 300 RO System
Aqua Medic Premium Line 300 RO System
Dispatch in 7-14 days
£178.15
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