What's an ORP reading should be & how do you bring PH level up?

Discussion in 'Reef Tanks' started by junbug1970, Nov 4, 2003.

  1. junbug1970

    junbug1970 New Member

    Hello all,
    I just recently setup a neptune system to my tank. what is a good ORP reading should be? mine is reading anywhere between 440-450. is this good?
    if its too high, how do i bring it down? if its too low, how do i bring it up. please advice.
    Also, i have MTC pro-cal dual chamber calc reactor, is producing 1 bubble per second as it supposed to be. Calcium is reading 465-480 so i am good there, however my PH is dropping to sometime 7.7 and i've added PH8.2 mix and it brings it up to 8.1 for about 15-30 min and starts to drop again. How do i maintain 8.1-8.2?
    Please help.
  2. squidd

    squidd New Member

    ORP generally 370-390mv...450mv sounds a bit high O3 becomes toxic around 500mv...
    I'm guessing on the calc reactor but 1 bubble/sec "may" be a bit much for your flow rate and some "unreacted"CO2 is entering the
    main tank lowering the PH level
    When is the level low...and is it constantly below 8 without additives?
    Heres a bump, maybe some else can add in.

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