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Thread: Reverse osmosis (ro) systems

  1. #17

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    Thanks, I'll look into that.

    -Ben

  2. #18

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    I am expecting to receive the RO filter tomorrow, and I have a couple quick questions:

    1.This system has a final granular activated carbon filter "for taste" that the manual says may release carbon dust into the water. Is this harmful to the plants? Should I remove it?

    2. Does anybody have enough experience with these eBay systems to know if they are safe to drink from? I am kind of wary about drinking water from a filter off eBay and would like to know if there is a big risk in case I ever want to use any water for stuff other than plants.

    Thanks,
    Ben

  3. #19

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    Sorry for posting again, but I just received the RO filter from Aqua-Safe Systems. Using the TDS meter, I determined that my tap water has a TDS of 31 at worst, and low 20s at best!! Apparently the water company wasn't exaggerating about having high quality water. I thought it would be a lot worse because of the white buildups I have seen after water evaporates.

    I installed the filter since I still need a way to remove the chlorine and other chemicals. My water pressure is also quite good at 70PSI. After the RO membrane, the water had a PPM of 2. After the DI stage, the PPM was 0, the same I get with my distilled water. Unfortunately the final carbon filter brings it up to the low 20's again. I was told that this should go down after it has been in use for a while. Hopefully it doesn't affect the plants.

    With such high quality water, will the filters last longer than the usual 6 months, or will chlorine still require them to be replaced just as much?

    In any case, I plant to test the affects of pure tapwater on some extra plants to see if they can handle it, since it gets such a good reading.

    -Ben

  4. #20
    Tony Paroubek's Avatar
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    It is imperative that you replace the carbon Prefilter on a regular basis, depending how much total water you put through the system. This is the filter that is removing the chlorine. If the carbon prefilter stops removing the chlorine it will get through to the RO membrane and punch big holes in it. This will allow sodium, calcium and all sorts of other mineral molecules to pass through into the water your collecting. Or in your case into the Post DI cartridge. Which will get very expensive to keep replacing.. or you will not replace it and your water will not be as high quality any more. Which is why a TDS meter is nice with an RO system because the membranes are usually only good for a few years roughly and need replacing sooner or later. The TDS meter will allow you to keep an eye on how well the RO membrane is working.

    Sounds like your post carbon filter is leaching some minerals.. not an uncommon thing. I would just remove it and toss it..A post carbon filter after RO/DI to improve taste is baloney. Water that pure (ro/di) will taste flat but that's because it has no minerals in it! With the post carbon filter leaching some minerals, it adds a little life to your taste buds.

    Yes you can drink the pure ro/di water.
    Is that a Nepenthes in your pocket or you just happy to see me?

  5. #21
    VFT and Drosera lover vft guy in SJ's Avatar
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    Quote Originally Posted by [b
    Quote[/b] (Tony Paroubek @ June 03 2005,6:44)]It is imperative that you replace the carbon Prefilter on a regular basis, depending how much total water you put through the system. This is the filter that is removing the chlorine. If the carbon prefilter stops removing the chlorine it will get through to the RO membrane and punch big holes in it. This will allow sodium, calcium and all sorts of other mineral molecules to pass through into the water your collecting.
    Uhhh uh oh.. hehe... Ok mental note, **First thing in the morning go out and replace the carbon and sediment prefilters that Max gave me when he gave me his old system. [img]http://www.**********.com/iB_html/non-cgi/emoticons/new/smile_l_32.gif[/img] Ive had them sitting here brand new in the box since I got the system in late January.. lol

    Thanks for the tip Tony.. I didnt know it was that serious to keep those fresh.

    Steve
    There are only 2 infinite things... the universe and human stupidity, and I'm not too sure about the universe.

  6. #22

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    Thanks Tony, sorry for all the amateur questions [img]http://www.**********.com/iB_html/non-cgi/emoticons/new/smile.gif[/img] . One more thing: I currently have the unit outside connected to a spicket because there is not space in the house. If it gets 80-90F outside is this going to damage it? I have it in a shady area and plan to keep it covered when not using it.

    I plan to bring it inside before the winter when I get some space cleared up.

    Thanks for all the help!
    -Ben

  7. #23

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    I'm definitely resurrecting an old thread here but what is the ideal tds for cp's. I have an R/O system that was installed by the previous owners of my house. I would like to know the best way to find out if this system is suitable for cp's.

    thx

    z
    "You can never underestimate the stupidity of the general public" -Scott Adams-

  8. #24
    Nepenthes Specialist nepenthes gracilis's Avatar
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    Have the water tested, as long as it below 100ppm its fine for all CPs and if its up to 150ppm Nepenthes can only tolerate it as a general rule of thumb.

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