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Old 10-05-2005, 05:21 PM   #11
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Aaaaaaaaah, well that stinks. It makes sense, I guess I figured if TDS = 0, I was all set.

Thanks for all the responses.

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Old 10-05-2005, 07:35 PM   #12
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Follow-up.....this thread is getting long, sorry. Just trying to understand what is going on.

So, I tested my ro/di water and I was getting .5 PO4 out of the ro/di. I took the DI cartridge off and brought it upstairs in the light so I could see what color the resin was. It was green, but it appeared to be kind of stuck to one side. I shook it up, put it back together and ran water through. I'm now getting 0 PO4 out of the RO/DI unit. I'm going to keep an eye on the PO4 coming out of the unit, but for now, while I'm getting 0 PO4 I'm going to start doing water changes every other day to try and get the PO4 in line. It's about .5-1.0 in my tank right now.

Just thought I'd post this in case anyone had any similar experience or any insight why my PO4 went from .5 to 0 and if it had anything to do with the clumped up resin in the cartridge.

Thanks again.

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Old 10-05-2005, 07:40 PM   #13
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from what ive read.. DI media shrinks and water can flow around it as its being used up.. taking it out and remixing it and adding a little more to the cartratge is suppose to extend the life of it (this assumes you have a refillible housing for your DI media), Longer more narrow cartrages are suppose to make the media more effecent for this reason.. HTH

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