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Old 04-17-2012, 05:05 PM   #1
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How Much TDS Should I be Getting out of my RO?

I just installed a new RO filter. Here is the link.

5 STAGE 50 GPD HOME REVERSE OSMOSIS SYSTEM WATER FILTER | eBay

I am curious about how much TDS I should be getting out of it. I was thinking that I should be getting 0 TDS and when it gets up to 10-20 TDS I should change the filters.

My source (City water) water reads about 150-165. I am getting out 10-14 TDS.

I bought a Dual inline TDS meter and installed it also.

I flushed the system for 2 hours and then waited 45minutes and flushed it for 10 minutes (emptied the tank). While flushing the TDS dropped from 50 TDS to now its bottomed out around 10 TDS.

Is this to be expected for this setup? Am I doing it wrong? lol
Do I need to do/buy something else?

Thanks for anyones input, thoughts, experience.
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Old 04-17-2012, 05:07 PM   #2
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I dont know your system, but you should have 0 tds. Mine got up to 24 and I replaced the DI canister and it went back to 0. My tap water was 320.
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Old 04-17-2012, 05:50 PM   #3
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I'm not sure I have a deionizer
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Old 04-17-2012, 07:19 PM   #4
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You don't according to the link... and you should probably add one if your intent is to make reef tank water. 24 is probably about right for an RO system with no DI resin.

I think you could add a DI canister for not a lot of cost. Bulk reef supply sells everything you would need to add another stage. It would probably be like $30-40.
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Old 04-20-2012, 08:18 PM   #5
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Agree on the DI Canister. My water is crappy coming into my RO unit (around 300 TDS) and after a few months I am putting out about 24 TDS. As soon as I change my DI filter it goes back down to 0 TDS.. So yes a DI canister will help you very much. I am going to get a better one in the April bulk reef supply group buy.
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Old 04-20-2012, 08:55 PM   #6
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On your guy's suggestion I bought this to add on I wanted to get it from the same seller I bought the other filters from but they were out of town until the end of the month and I didn't want to wait.

Do you think this will do the trick?

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Old 04-20-2012, 09:47 PM   #7
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Never used it or seen anyone use it, so I can't say for sure if it is a decent DI unit, but yes, it should work...
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Old 04-21-2012, 07:31 AM   #8
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Yeah, it is the same unit I have. Works fairly well only thing I noticed is now it drips slowly from the seal after I opened it to replace the DI resin in it. I am going to upgrade mine to a canister type since the canister one is a little larger. Make sure you also bought the clips to hold it on top of your unit.
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Old 04-21-2012, 08:32 PM   #9
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Ok added 6th stage to my RO, so now I should have RO/DI with 0TDS . Purging my tank now so we will see. Wasn't hard, and I did order the clips.

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Old 04-24-2012, 04:18 PM   #10
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Quote:
Originally Posted by markiezzi
Yeah, it is the same unit I have. Works fairly well only thing I noticed is now it drips slowly from the seal after I opened it to replace the DI resin in it. I am going to upgrade mine to a canister type since the canister one is a little larger. Make sure you also bought the clips to hold it on top of your unit.
Maybe try some Teflon tape, I've had a couple things leak, not my filter but some used skimmers and filters, and had good luck with Teflon tape sealing up leaking connections
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