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Membrane capacity

Aquarium RO-DI filters – reverse osmosis and DI | MojaWoda

RO-DI filters for aquariums

RO-DI filters for aquariums are reverse osmosis systems with additional DI resin demineralisation, designed to prepare very clean, low-TDS water. This category includes RO-DI filters for marine and freshwater aquariums, useful for water changes, top-ups and preparing water for demanding tanks. They are a good choice for aquarists who want better control over water parameters and reduced unwanted impurities.

CALCULATE BEFORE YOU CHOOSE

Useful calculators

Check the key values before choosing a solution.

Convert GPD to litres Check the approximate daily output of a reverse-osmosis membrane.
Convert GPD to litres

RO membrane output converter (GPD)

Convert GPD to litres and view a simplified temperature and feed-pressure correction.

Nominal output (L/day)—
Estimated output (L/day)—
Estimated output (L/hour)—
Average output (L/min)—

GPD means US gallons per day: 1 GPD = 3.785411784 L/day. Nominal output is a unit conversion. The estimate uses FilmTec temperature correction and a pressure ratio; it excludes osmotic pressure, tank backpressure, TDS, recovery and membrane ageing. Enter your membrane datasheet test conditions — 4.5 bar is not universal.

Assumptions, scope and model version

GPD means US gallons per day: 1 GPD = 3.785411784 L/day. Nominal output is a unit conversion. The estimate uses FilmTec temperature correction and a pressure ratio; it excludes osmotic pressure, tank backpressure, TDS, recovery and membrane ageing. Enter your membrane datasheet test conditions — 4.5 bar is not universal.

Technical source

Model version
MW-GPD-2.0
Technical basis
1 US gal = 3.785411784 L; MW-GPD-2.0
Technical owner
NIST / MojaWoda.com
Scope
Preliminary comparison of nominal RO membrane output; not a permeate-production guarantee.

There are 6 products.

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Showing 1-6 of 6 item(s)
Active filters
RO4 Aqua Vita DEMI 75 GPD Aquarium RO Filter
★ 5.0
Reviews: 15

20 people bought this

RO4 Aqua Vita DEMI aquarium filter osmosis 75gpd

4-stage reverse osmosis filter with a 75GPD membrane and MB400 resin for producing demineralized water.
Membrane
75 GPD
Stages
4 etap
DI
Yes
Pump
No

Brand: AQUA VITA

Free delivery within Poland
Price 65.61 €
RO4 Aqua Vita DEMI Reverse Osmosis Aquarium Filter
★ 4.9
Reviews: 12

35 people bought this

RO4 Aqua Vita AKVALINE DEMI aquarium filter

4-stage reverse osmosis system with VONTRON 75GPD membrane and MB400 resin for producing demineralized water.
Membrane
75 GPD
Stages
4 etap
DI
Yes
Pump
No

Brand: AQUA VITA

Price 42.91 €
RO4 Aqua Vita DEMI 100 GPD Aquarium RO Filter
★ 5.0
Reviews: 10

33 people bought this

RO4 Aqua Vita DEMI aquarium filter 100gpd

4-stage reverse osmosis filter with a 100GPD membrane and MB400 resin for producing demineralized water.
Membrane
100 GPD
Stages
4 etap
DI
Yes
Pump
No

Brand: AQUA VITA

Free delivery within Poland
Price 67.88 €
Professional Aquarium RO/DI Filter AC-OM-75

1 person bought this

AQUAVITA RO4 DEMI PRO Aquarium Filter AC-OM-75

AQUAVITA RO4 DEMI PRO is a professional premium RO/DI system that provides completely demineralized water with zero TDS, ideal for the most demanding marine and freshwater aquariums.
Membrane
75 GPD
Stages
4 etap
DI
Yes
Pump
No

Brand: AQUA VITA

Free delivery within Poland
Price 79.23 €
Temporarily out of stock Aqua Vita RO4 Aquarium RO System with TDS Meter & Spares

1 person bought this

AQUARIUM WATER FILTER RO4 DEMI TDS METER +SPARE

Aqua Vita RO4 reverse osmosis system for preparing demineralized water for marine and freshwater aquaristics. 4 stages of filtration (sediment, carbon block, demineralizing resin MB400, Supreme 100 GPD membrane) and a dual TDS meter for constant water quality monitoring (in/out). The package also includes spare cartridges, mounting accessories, and a 1/4 inch hose.
Membrane
100 GPD
Stages
4 etap
DI
Yes
Pump
No

Brand: AQUA VITA

Price 115.10 €
Check availability
Aquarium RO4 200 GPD Deionizer Water Filter System

4 people bought this

Aquarium Water Filter RO4 200 GPD Osmosis for Aquarium Deionizer

AQUAVITA reverse osmosis aquarium filter RO4 with AC-OM-200 membrane 200 GPD and demineralizing cartridge with MB400 resin (Purolite). The set includes 10-inch housings and BPA FREE cartridges, designed for preparing completely demineralized water for marine and freshwater aquariums. The package includes connection accessories, tubing, a wrench, and Teflon tape.
Membrane
200 GPD
Stages
4 etap
DI
Yes
Pump
No

Brand: AQUA VITA

Free delivery within Poland
Price 101.48 €
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