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RO Systems...WTB - advice?

Posted: Jan 08 2015 10:04pm
by r3volved
Roommate and I are looking at investing in a reverse osmosis water filtration system and I'm looking for any tips or advice. I don't know much about anything on the market, what to look for or what to avoid.
We're currently using a countertop distillation system but can't keep up with our needs and looking for something that could maintain about 30L/day.

Re: RO Systems...WTB - advice?

Posted: Jan 08 2015 11:34pm
by Ykick
I've had one with about 6L tank under sink for 8 years. If your tap water sucks RO will make a HUGE difference. Be aware, it runs low PH and of course various filters require scheduled replacement but with regular use the membrane filter lasts a very, very long.

30L/day? That seems a rather large amount? RO back-flushes the membrane filter in order to clean it and the almost caustic, briny waste water from back-flush operation can be hard on drain plumbing. Another consideration is that it seems to use considerable amount of water to make potable water. And since RO process removes Chlorine anything post filter can have a tendency to grow weird shit. Some people install an Infrared bacteria killing light in the water delivery line.

But frequent use (which 30L/day would accomplish) and regular filter maintenance/replacement will keep an RO system in good shape.

Re: RO Systems...WTB - advice?

Posted: Jan 12 2015 12:07pm
by r3volved
30L IS a large amount but my distiller is getting old and can't keep up with my household and garden needs...the tap water is too F'd here to use.
That gives me a good baseline to start looking around, much appreciated.

Re: RO Systems...WTB - advice?

Posted: Jan 14 2015 9:08am
by Ypedal
When i was on well water, horrid stuff.. 650 ppm and ph 8+

I got a system from these guys:
http://www.aquasafecanada.com/?gclid=CL ... 7Aod_AMA7w

best prices i could find in Canada and it worked really good.

you reject 75% if i recall .. so for every gallon you make.. you waste 3 ... but 30L is easy to produce.

The 6 stage system will take elephant piss and produce perfect 0 ppm ph 7 water.

Re: RO Systems...WTB - advice?

Posted: Jan 14 2015 12:58pm
by friendly1uk
Something might be wrong if your getting ph7 from an RO machine. They are about 50% effective on boric acid, so the product is usually acidic. Perhaps 6.5 in practice. Often multi-stage filters are not just filters though. The last stage could be about ionic exchange as it's not going to be zero ppm your getting.

New filters every couple of months is a bit of a ball ache, but it's possible.

Don't feed it your plants. They will also suffer from reverse osmosis. Destroying the root system and giving a limp over watered appearance. Odd when you think about what rain is. Perhaps with a good damp soil you would be fine. It's no good for cuttings in inert media though, or any other water culture growing you might be doing.

Incidentally, If you are thinking hydroponics, don't correct the PH unless it's extremely acidic. Your waters fine, your foods fine, start chucking in anything else and you will see PH problems. Your run-off should be your guide to substrate PH as your water will have next to no buffering ability so will adopt the substrates PH. Any extra acid or alkali will have a greater effect on the root zone than your water. Don't even bother to measure your feed, just measure the initial run-off when you water.

Re: RO Systems...WTB - advice?

Posted: Jan 14 2015 3:05pm
by r3volved
I'm looking for the ~0ppm so that it can be modified chemically for each different plant's needs. It allows for much easier experimentation and precision results.
Distilled was adequate but not efficient enough and I keep finding new plants so the gardens keep expanding.

Substrate is also highly controlled and the point being I want everything as highly controlled as possible.

Re: RO Systems...WTB - advice?

Posted: Jan 14 2015 3:08pm
by Ypedal
You have to give it pressure from the plumbing side for it to work, i recommend finding a thread-on coupler for your existing faucet or garden hose line ... instead of using their piercing needle valve thing on your house plumbing. ... city pressure works fine.. on crappy jet pump and well water.. not so great but still works.

Re: RO Systems...WTB - advice?

Posted: Jan 14 2015 4:16pm
by friendly1uk
A 0.5 micron carbon block might make your supply manageable.

The closer you are to the water source, the more likely particulate filters will work. You might be able to remove heaps of dissolved solids with good filtration, and absorb voc's and metals with carbon. Cleaning up the supply many times over.

Do you have any specific complaints about your supply?

Re: RO Systems...WTB - advice?

Posted: Jan 19 2015 5:38pm
by yopappamon
Ypedal wrote:You have to give it pressure from the plumbing side for it to work, i recommend finding a thread-on coupler for your existing faucet or garden hose line ... instead of using their piercing needle valve thing on your house plumbing. ... city pressure works fine.. on crappy jet pump and well water.. not so great but still works.
I have at problem, low well pressure. I got a booster pump from Aqua Safe Canada, works great now.

Re: RO Systems...WTB - advice?

Posted: Aug 02 2017 5:34pm
by gogo
Phoenix, and Tucson, Az residents buy a lot of RO systems because they are at the end of the Colorado River canal and there's been much evaporation. I tested the tap water in Phx and it had 10X the PPM of bottled water. Anyway, looking at what people there buy might be useful.

Re: RO Systems...WTB - advice?

Posted: Aug 12 2017 10:21am
by spinningmagnets
My be consider the option of only using RO water for drinking, and then...running all the incoming water through an activated charcoal filter, using bulk charcoal purchased from an aquarium supplier?

Using RO water for your garden is commendable, but...I don't think there's a major benefit to that...

Re: RO Systems...WTB - advice?

Posted: Aug 14 2017 8:59am
by r3volved
lol ...everything has an effect on the end-quality of the medicine... :pancake: