0030 2310 383 588
We'll be glad to assist you!

4 stages Reverse Osmosis system for aquariums - Primato USA4GB-RO-AQ

In stock
(Including tax)

Primato USA4GB-RO-AQ provides crystall clear water for your aquarium. It reduces limescale, heavy metals, carcinogens, arsenic, nitrates, lead, VOC's etc. 

It comes with a 10 year warranty! 

  • Shipping and Payment Costs

USA4GB-RO-AQ system

  • HEAVY DUTY housings.
  • Produces crystall clear water for your aquarium.
  • Completely removes all harmful substances from water. 
  • Includes everything you need to install it quickly. It also includes a float valve that stops the system when the aquarium is full of water.

made in USA Primato ULTRA CTO and Primato ULTRA PB cartridges are made in the USA.

Filtration stages:

primato ultra cto

In the first stage the water is filtered through the Primato ULTRA CTO activated carbon filter (5 microns).

  • Reduces chlorine, chloroform, unpleasant taste, odor, suspended particles, sand, rust, mud, soils, total organic carbon, industrial organic compounds (tetrachloroethylene, trichloroethylene), soluble organic compounds, dissolved organic compounds, manganese, industrial waste and many other substances harmful to the body.
  • Made in the USA.
  • Greatly improves water's taste and odour.
  • Needs replacement every year. 
  • Permeability: 5 μm
primato ultra pb

In the second stage, the water is filtered through the Primato ULTRA PB activated carbon filter (0.5 microns).

  • Effectively reduces chlorine, unpleasant taste and odor, heavy metals, chloroform, pesticides, organic chemicals, volatile organic compounds (VOCs), industrial residues, toxic, turbidity, cysts, Cryptosporidium, Giard Toxoplasma, bacteria, microorganisms, asbestos fibers, particulate matter, mud, rust, soil and various other harmful substances.
  • Also removes: alachlor, endrin, simazine, atrazine, ethylbenzene, styrene, benzene, ethylene dibromide (EDB), 1,1,2,2-tetrachloroethane, carbofuran, haloacetonitriles, tetrachloroethylene, carbon tetrachloride, bromochloroacetene bromochloroacetene, trombone 2,4,5-TP (silvex), chloropicrin, dichloroacetonitrile, tribromoacetic acid, 2,4-D, trichloroacetonitrile, 1,2,4-trichlorobenzene, dibromochloropropane (DBCP), haloketones, 1,1,1-trichloroethane, o -dichlorobenzene, 1,1-dichloro-2-propanone, 1,1,2-trichloroethane, p-dichlorobenzene, 1,1,1-trichloro-2-propanone, trichloroethylene, 1,2-dichloroethane, heptachlor, trihalomethanes (TTHM ), 1,1-dichloroethylene, heptachlor epoxide, bromodichloromethane, cis-1,2-dichloroethylene, hexachlorobutadiene, bromoform, trans-1,2-dichloroethylene, hexachlorocyclopentadiene, chlorodibromomethane, 1,2-dichloropropane, lindane, , 3-dichloropropylene, methoxychlor, xylenes, dinoseb, pentachlorophenol
  • VOC's (Volatile Organic Compounds) contain chemicals that come from both humans and nature. We usually find them in wells or pipelines. Some VOCs are pesticides, herbicides and insecticides that enter groundwater after application by humans. Some other volatile organic compounds enter groundwater from industrial use or from sewers. PRIMATO ULTRA PB also reduces trihalomethanes which are by-products of water chlorination.
  • Made in the USA from 100% coconut carbon.
  • Lead reduction 2500 gals @ 0.75GPM (9500 L)
  • VOC's reduction 500gals@1GPM (1900 L)
  • Chlorine reduction >8000 gal @ 1 GPM (30000 L)
  • Improves water's taste and odour.
  • Need replacement at least once per year.
ro membrane

In the third stage is the membrane of reverse osmosis. The membrane has a permeability of 0.0001 microns and a production of 50GPD (Galons Per Day), ie 189 liters per day. Limescale, nitrates, chromium, arsenic, poisons, germs and bacteria are filtered here.

DI filter

In the fourth and last stage is the deionization filter. This filter consists of cationic and anionic ion exchange resin. The mixture of these two is called mixed bed resin.

Cationic resin (positively charged)

  • Removes positively charged ions such as calcium ions, magnesium ions, etc.
  • It softens and completely desalts the water.
  • Removes barium and radio

Anionic resin (negatively charged)

  • Removes negatively charged ions such as nitrates, perchlorates, arsenic, total organic carbon, uranium, etc.
  • It binds ionic halogens as an antimicrobial disinfectant.
  • Removes barium and radio

When cationic and anionic resins are mixed together, the result is water with zero conductivity (0 TDS) in water. Minerals in water are exchanged with hydrogen cations (H +) and hydroxide anions (OH–) by the resin beads to form very pure water (H2O).

Easy installation

μεμβράνη ώσμωσης

The colored tubes help you to quickly and easily install the system.

The white tube connects to the cold water supply.

The black tube connect to the drain kit.

The blue tube connects to the float valve which is mounted on the aquarium glass.

All fittings come with small blue fuses. To remove a tube from the fitting, you must first remove the blue fuse and then pull the tube out while pushing the socket from the fitting inwards.

In the original packaging, we have put small pieces of colored tubes to make it easier for you. So, we fixed a small black tube at the drain outlet, a small piece of white tube at the water supply and a small blue tube at the outlet of the clean water.

φλοτερ ενυδρείου

The float valve is placed on the glass of the aquarium.

Once the water level in the aquarium drops, the float valve drops down and the system starts refilling the aquarium with water. Once the aquarium is filled with water, the float valve goes up and the system stops working.

Custom made RO's

We can assemble a reverse osmosis system according to the needs of your aquarium. Contact us and tell us your needs (eg conductivity, hardness, connection method, etc.). We can make all kinds of systems for you. We'll be happy to assist you!

"How do I choose the right cartridge for my water filter?"

Below the "Add to cart" button you can click on "HOW TO CHOOSE THE RIGHT FILTER". A text will appear on your screen summarizing the functions of available replacement filters for this water filter. Other replacement filters fit into your housing as well, but because there are a lot, we only recommend specific filters.

Also, just below the product description, you will see the available cartridges. If you click on the quick view "eye" you will see a summary of the specific cartridge. If you click on the image, you will be taken to the cartridge page where you can see more details. If you have not yet decided which replacement filter is right for your water filter, simply contact us! We will be happy to assist you!

"Should I install a filter on the counter or under the kitchen counter?"

This depends on your needs and the available space in your kitchen. Generally speaking, the countertop filters can be installed in seconds, but they take up space on the kitchen counter. Under-sink filters do not require space on the bench, but they need skilled hands for installation or even a plumber.

"I do not know if I need a single, double or triple filter"

If you are having problem with your water's bad taste and odour, then you need a single filter. But if you also have a lot of dirt in your water, then you need a double filter - the first stage will be a filter for reducing mud and the second one an activated carbon filter for reducing chemicals. But if you have 3 problems (eg hard water, mud and bad taste), then you need a triple filter, one for the reduction of scale, one for the mud and one for improving taste and reducing chemicals. If you use drilling water then you need a reverse osmosis filter. Whatever problem you are facing with your water, if you are not sure, just contact us! We will be glad to find the right water filter!

"How do I remember when to change my cartridge?"

Forget abou it! When it's time to change your cartridge, we'll call you or email you to remind you!

"If some part of the filter breaks, do you have spare parts?"

We have all the parts you may need for your water filer.

"What does the warranty include?"

In order for the warranty to be valid, you must maintain the filter correctly (of course it's not valid if you break it yourself and you should use the cartridges displayed in our website. If you clean your water filter internally every time you change the filters and if you change the filters at the scheduled time, your water filter should last for many, many, many years. If, however, your water filter has a problem of our own fault, (even if it was damaged during transportation) , we immediately take it back at our own expense and send a new one as soon as possible.

"I have lost the wrench and can not unscrew the device to change the cartridge"

We have all the parts you may need for your water filter, including the wrench. Feel free to contact us for assistance.

"I can't or I don't want to order electronically. Is there any other way?"

Of course! Just call us at +30 2310 383 588 and we'll take your order over the phone!

"I want to pay using my credit/debit card, but I do'nt have good computer knowledge."

No problem! Just call us at +30 2310 383 588 while you are on your computer and we will help you order online step by step.

"How long does the courier need to deliver the products to my house?"

Click on the "SHIPPING AND PAYMENT COSTS" located under the product's price for details.

"What if my water's quality changes?"

Contact us to find the right filter for you or browse our website to check all the available cartridges.

"Who will install the filter?"

Each water filter includes instructions in case you want to install the water filter yourselves. We've also made installation videos. You will find them on the product page you are interested in. Of course our experienced technicians are always on duty and at your disposal if you need assistance!


No reviews found

Add cartridges and get 20% OFF

Instructions: Add the filter in your cart. Then, from the cartridges below, add as many as you wish. You will automatically get a 20% discount on checkout.


Free Tracked Courier Shipping
on orders over 100€

+30 2310 383 588
We'll be happy to help you!