Geekpure 3-Stage Portable Aquarium Countertop Reverse

System works well and offers great value. I use it to fill my fish tank and my 5 gal water cooler. Using standard tap pressures of 50-60 psi it yields 5 gals of water in 80 mins. At this rate the systems 24hr capacity would be ~90 gals.

I opted to forgo the included concentrate (or reject) water drain saddle that is meant to attached to your sink drain plumbing. I am in a rental unit and did not want to create a permanent installation.

I used an aftermarket ‘T’ shaped fresh water supply value, as the included one did not meet my expectations. This aftermarket valve allowed me to safely isolate the system to mitigate the risk of an RO system leak when it is unused and unattended. I also installed two aftermarket push-to-connect valves to the concentrate (or reject water) and permeate (filtered water) output lines in order to completely isolate and seal off the system when not in use. These modifications allow me to store the RO system in a plastic tub under my sink, where it remains ready for use and sealed against pathogens/ microbial growth.

With modifications, I estimate my total cost is ~$72 USD.

I highly recommend the unit as it is a simple effective device that offers excellent value.

Yeah. This is a very good bargain. It gets me clean water. I recommend putting a faucet before it, and I swapped the post carbon filter (for taste, it says) to being on the blue output line instead of before the membrane. No carbon dust on the membrane. So. Yeah. Great!
$50 is a great deal!

I brought this filter to provide RO water to a home fish breeding system. The price was attractive – less than what it cost to replace filters on a different system so I bought GeekPure. I test my water parameters with meters and can verify that the filter brings water down to acceptable ppm levels for TDS and EC (electro conductivity). My fish eggs get fertilized and hatch in this water. Why am I taking away a star? A faucet adapter should be included in the package and isn’t. I do not want to pierce a water line so I had to spend extra for a faucet adapter. Take away a star. Learn a lesson please, Geekpure people.

Funciona muy bien para acuario. En menos de 1 da se consigo los 100 litros que me faltan siendo invierno (la tengo instalada en la terraza en el exterior). El agua que rechaza es de 1:3/1:4 nada de 1:2 como dicen.

It does a great job producing GH 0 TDS 3 RO water for my 60L aquarium. It comes with a bunch of accessories and extra tubing to hook it up permanently to your plumbing. But I was able to get an adapter from my hardwater store to hook it up to the tap outside (‘hose bib tap’). It uses industry standard “1/4 inch” RO/DI tubing. I find it produces roughly 1 litre of RO water for nearly every 2 litres of ‘waste’ water that I throw on the garden. If you are looking to produce a lot of RO/DI water regularly I would consider a more serious kit.

Geekpure replacement cartridges are expensive but I’ve been able to find cheap inline replacements. Note this one lacks a DI unit which I would recommend if you plan on for example keeping a reef quarium. You can find cheap inline DI units to add on to this kit if needed though.

The system works very well, but the filter kit only comes as a complete kit and it’s nearly the cost of the unit when it’s actually available on Amazon, which isn’t often. The only filter that isn’t widely available is the enclosed sediment filter, so I came up with a fix for that:

1x 10 inch generic water filter housing: $20

You just need some extra hose (search 1/4 ro water line, you can usually get it with a fitting kit), zip ties and a fitting kit to adapt it to the unit. Then you can buy generic 10 inch sediment filters, which will run you $30 for a six pack!

The carbon filter is a widely available coconut carbon post filter, they are cheap and can be bought in multipacks. Then you have the RO membrane (you’ll need a 100gpd membrane), also widely available. Now you can change the filters as needed and not waste money buying a complete filter kit every six months!

Bought this unit to use for my aquariums (South American fish). After the initial system flush I tested the water (day 1) pH in the low 6’s GH & KH in the 0 – 2 range. Plan is to slowly introduce small amounts of R/O water during water changes and slowly get my water to a lower pH and softer. …so…so far so good. btw – I didn’t want a permanent undersink setup so I bought the faucet adapter and just hooked it up to my kitchen faucet…easy to do and remove.

This little powerhouse is a magnificent marvel of technology. For less than 60 dollars, this system can not be beat!

Comes mostly assembled. All I had to do was insert the RO membrane into the cylinder and connect water input. This does NOT come with a garden hose adapter, so I purchased one separately that was listed in the “Frequently bought together” list.

We have terrible well water that comes out RED sometimes from all the clay deposits. My EC meter measures 650ppms on our raw well water (500ppm scale). The water produced from the clean water line of this filter reads 0PPM! I have had this unit for a couple weeks now and it has produced over 200 gallons of pure, clean, great tasting water for me and my plants!

If you are a gardener, this RO system is a MUST!

If you are a clean water fanatic, this system is a MUST!

Great tasting water! SO happy with this purchase! The replacement filters are only 37 dollars for the whole set, which is VERY affordable! A friend of mine has had this RO system for 2 years and has never even replaced his filters, and his still works great!

It may not be the fastest RO system on the market but if price is an issue, BUY THIS UNIT!! I suggest buying a tank or 5 gallon water jugs to store the clean water in, as it takes about 5 minutes to get a full 16 oz glass of water. Also, does not require crazy high water pressure. I’d say our water pressure is no more than the average household water pressure and the system still performs just fine.

I am telling ALL of my friends about this great filter system! I wish I had found this a long time ago! Thank you OSMOPUR for making a great, affordable RO system! Finally, EVERYONE can afford clean water!