Simple, affordable RO units?? - Page 3 - The Planted Tank Forum
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post #31 of 43 (permalink) Old 12-13-2012, 03:03 PM
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Just wondering which RO unit you ended up ordering, and if you got it hooked up yet, how is it working? I'd like to get one for Christmas too and not sure which one to get.
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post #32 of 43 (permalink) Old 12-13-2012, 04:46 PM Thread Starter
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I think hubby ordered from Bulk Reef Supply, it was a 3 stage unit they had on sale for like, $140 I believe. It's not hooked up or out of the box even...Christmas gift and all
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post #33 of 43 (permalink) Old 12-14-2012, 02:28 PM
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I paid £30 / 48 USD for mine and it works perfect. 3 stages of filtration gives me 12ppm with zeros on gh and kh. Not too sure if im gonna expand to a add on DI filter, as my fish / shrimp breed fine without.
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post #34 of 43 (permalink) Old 12-15-2012, 04:32 PM
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A question.

I am under the inpression that RO units create alot of waste water.

For example, 1 gallon RO creates 5 gallons "waste" water?

Is that true?
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post #35 of 43 (permalink) Old 12-15-2012, 04:58 PM
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Depends upon the membrane you're using.

If you've got a cheap one? You're likely going to waste a ton of water.

Most efficient membrane = most expensive.

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Originally Posted by ncharlie View Post
A question.

I am under the inpression that RO units create alot of waste water.

For example, 1 gallon RO creates 5 gallons "waste" water?

Is that true?
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post #36 of 43 (permalink) Old 12-15-2012, 10:58 PM
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Quote:
Originally Posted by ncharlie View Post
A question.

I am under the inpression that RO units create alot of waste water.

For example, 1 gallon RO creates 5 gallons "waste" water?

Is that true?
My 150GPD products 3-4 gallons of waste water during the summer. During the winter time if you're in a colder climate people run a longer tubing through a heated bucket of water to improve efficiency. Also your water pressure needs to be high enough too or it won't be efficient.

I noticed that using too small of the filters for the sediment and carbon dramatically increased the time and also increased the waste water some. I already bought too much 1um filters... I'd stick with 5um sediment and carbon blocks.
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post #37 of 43 (permalink) Old 12-16-2012, 04:04 PM
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Where does the waste water come from?

Sorry. RO stupid here.
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post #38 of 43 (permalink) Old 12-16-2012, 04:08 PM
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RO/DI filters separate everything from water. All dissolved solids - dirt, calcium, et al - exit from the waste water point. Pure H2O (0 dissolved solids) flows from the other point.

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Where does the waste water come from?

Sorry. RO stupid here.
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post #39 of 43 (permalink) Old 12-16-2012, 04:45 PM
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I have a PWC 5 stage RO unit.
After 6 months I had to replace the membrane, ppm was up to 42 and my water out of the tap is 58ppm. imo membranes from PWC are cheaply made.

Now I have a Dow Filmtec membrane and I have a TDS of 3ppm, I wonder how long it will last.

I added a cartridge for increasing the alkaline level (adds calcium and magnesium) thats connected to my fridge. Also have 2 other outlets for normal RO water and DI water.

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post #40 of 43 (permalink) Old 12-16-2012, 04:53 PM
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fire water & ice have the mightymite

Can produce about 40 gallons a day.
Easy to set it to run and fill up a tub for a few hours, then turn off valve for water changes,

-G
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post #41 of 43 (permalink) Old 12-16-2012, 06:34 PM
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Quote:
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fire water & ice have the mightymite

Can produce about 40 gallons a day.
Easy to set it to run and fill up a tub for a few hours, then turn off valve for water changes,

-G
Did you mean Air water and Ice?

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post #42 of 43 (permalink) Old 12-17-2012, 05:43 AM
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my whole thing is i dont have any where to hook one so i would have to get a portable one. any one got suggestions on the portable one? i live in housing on a military post and cant really mess with the plumbing.
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post #43 of 43 (permalink) Old 12-20-2012, 02:04 AM
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Quote:
Originally Posted by nalu86 View Post
Did you mean Air water and Ice?
Air Water Ice :^) whoops! Yuppp
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