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  1. #1
    MARSH GUEST
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    High TDS with BRS 6 stage, any recommendations?

    I have a BRS 6 stage with booster pump. It's set at 80 psi. My well water is at 900-950 on a normal basis. Coming out of my RO going into my DI is 35-28 TDS depending on my feed TDS. Called BRS and they said the minimum specs on the DOW 75gpd is 96%, which by my calculations in getting about 97% rejection.

    So I knew going into this big tank build that water was my biggest problem. But I made about 60 gallons of DI/0tds water before the resin was spent.

    Before I run it thru RO I gas it off for 2 days, so I know it's not C02.

    Here's a few ideas I have.....tell me if I'm crazy

    1. So run it thru the RO system, THEN gas it off, then back thru the RO system again to get lower TDS before I send it thru the DI resin, so pretty much double filtering it thru the RO.

    2. Run it thru the RO, then buying a water saver kit, but running the "clean" water thru the 2nd RO membrane (instead of the waste water)

    3. Dealing with the fast consumption of DI resin $25 per 60 gallons (2 canisters)

    4. Trying out that BRS triple canister of single bed DI resin, which I am not convinced will help a huge amount, maybe a little.

    I'm not worried about "waste water" as I can use that to water the garden and fill up the pond. And seeing I have no water bill, no worries about that honestly. But I still have ALOT of DI water that I gotta make.

  2. #2
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    Call Spectrapure they can help. I have well water and can go longer than that. They have a 99% filter.

  3. #3
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    Agreed. I had the same problem with a BRS membrane. Brand new membrane had a rejection rate of about 94%. I was burning through resin like crazy. They told me the advertised rejection rate was 96% give or take 5% due to temperature. I didn't buy that story. Returned it and paid about $20 more for a 99% rejection membrane from Spectrapure. Put it in...problem solved. Call them. They will hook you up.

  4. #4
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    Make sure the di resin is tightly packed in also. I didn’t have mine packed in tight enough and I started to get channeling in my resin container which made me get high tds from that chamber my resin wasn’t spent it was just getting through the resin too fast and was unable to remove al the tds

  5. #5
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    You shouldn't be burning through DI that quickly even with 25tds. I order from Air water and Ice and use their 75g 99% rejection rate membrane. I believe my TDS out is around 12. I have to double check, but I've made close to 400g and my DI is still pushing out 0 TDS. When you install new filters are you flushing the filters and membrane for 10 minutes? Then you have to make 10g of RO water to throw away.

  6. #6
    MARSH GUEST
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    My water temp is heated with 100 feet of 3/8 line inside a bucket with a heater. That improved my rejection rate a bit.

    The DI resin is packed tight. When I do it, I have a plastic cup that fits perfectly and I smash it down hard. I can get a hair over 1.25 lbs in a Di cartridge.

    Yes, I always flush new filters, and do a pre flush for a few mins every time I use it before I send it down thru the DI resin.

    As far as a new RO membrane, I have a spectrapure RO system for my drinking water. That was actually the first thing I did was swap out the membranes. The spectrapure unit I have has a RO output with booster set at 75-80ish psi coming out at 16-20 which still isn't 99% rejection.

    I'm starting to think my water has something in it that even the RO can't remove, but no idea what that would be. It's not deadly (to humans) because we have been drinking this water for YEARS.

  7. #7
    MARSH GUEST
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    My spectrapure unit has the maxcap RO membrane. I would if used that for my reef water but it's just 2 stages then the membrane. And I don't think my wife would let me steal her drinking water.

  8. #8
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    My advice, call Spectrapure. That's all they do is water purification. Their tech guys have always been very helpful to me. I've had them spend 15-20 min on the phone with me trouble shooting my system. Call them and run your situation down to them and let them make some suggestions.

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  10. #9
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    I called spectrapure, they said to boost the pressure up more to 100 psi (currently at 80) and to buy a c02 test kit to see how much more I have to air off the c02. I don't think my problem is C02 because the TDS rejection is still not close to 98-99%. He said that 96% is probably what I'm gonna have to live with and buy DI resin in bulk.

  11. #10
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    I have 2 3 TDS after 99% membrane and my TDS is 800-900 out of the well.

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