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ro/di still have tds


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  1. #1
    jay13 - Reefkeeper CR Member
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    Default ro/di still have tds

    Hi, just put in a brand new ro/di unit and went from 340 tds to 6 tds. is this normal? thought it should be 0 tds. also just a trickle/ drips come out of di line. is this is a normal flow rate? 75 gpd ro filter maybe i just expected more flow.

  2. #2
    EMUreef - Reefkeeper
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    Quote Originally Posted by jay13 View Post
    Hi, just put in a brand new ro/di unit and went from 340 tds to 6 tds. is this normal? thought it should be 0 tds. also just a trickle/ drips come out of di line. is this is a normal flow rate? 75 gpd ro filter maybe i just expected more flow.
    how long has water been running through the filter?
    slow trickle is pretty common, usually do to poor pressure in the house, you can always buy a booster pump to get better pressure.

  3. #3
    Rabidgoose - Reefkeeper Moderator

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    Let it run for a while....waste some water. First time using it I would say throw away a 5 gallon pail full of product water. A trickle is about right, if it is a 75 gpd unit at optimum production that is only about 1 gallon every 20 minutes.
    I simply can't trust people that don't like bacon,

  4. #4
    jay13 - Reefkeeper CR Member
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    running for 24 hours now, inline pressure gauge ordered to check that. refilling my180 and sump after the crash and wow it just feels like it is taking forever. i guess if the tank and 75 gallon sump are full in four days i will have my answer to the flow portion. still i expected 0 tds and am getting 6.

  5. #5
    Rabidgoose - Reefkeeper Moderator

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    lol...yeah...it takes a long time. If its been a day I would have expected zero by now as well depending on the unit you have. Production however depends on more than just pressure, few of us get the advertised amount.

    good luck..........chuck
    I simply can't trust people that don't like bacon,

  6. #6
    dlhirst - Reefkeeper
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    You could have a defect in the RO membrane. That would allow things through that shouldn't normally get through. Is it really new, or just " new to you".

  7. #7
    jay13 - Reefkeeper CR Member
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    brand spankin new, installed all the filters myself. still at 6 tds it is over 98% efficient........ way better than the 340 tds!

  8. #8
    Heidi - Reefkeeper
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    Quote Originally Posted by jay13 View Post
    Hi, just put in a brand new ro/di unit and went from 340 tds to 6 tds. is this normal? thought it should be 0 tds. also just a trickle/ drips come out of di line. is this is a normal flow rate? 75 gpd ro filter maybe i just expected more flow.
    What is TDS?

  9. #9
    dlhirst - Reefkeeper
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    Total Dissolved Solids - the salts and minerals found in "clean" water.

  10. #10
    Joefish - Reefkeeper CR Member
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    Have you calibrated you TDS meter recently?

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