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Thread: Testing ORP probes with Iodine

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    Testing ORP probes with Iodine

    Something I picked up on from ENC.

    Pick up a std 2 ounce bottle of Tincture of Iodine (USP Grade) and dilute it with 473 mL of RO/DI water. After thoroughly mixed, place enough in a small container to check the probe. It should read between +440 and +455 mV. If it does not you have a probe issue, either dirty or it needs to be replaced.
    Last edited by Boomer; 02-16-2008 at 01:23 AM.
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    Copepod
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    great in fo for quick checking orp probe.

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    Quote Originally Posted by Boomer View Post
    Something I picked up on from ENC.

    Pick up a std 2 ounce bottle of Tincture of Iodine (USP Grade) and dilute it with 473 mL of RO/DI water. After thoroughly mixed, place enough in a small container to check the probe. It should read between +440 and +455 mV. If it does not you have a probe issue, either dirty or it needs to be replaced.
    Boomer, if I didn't want to make up 473ml of the solution ... say 50ml ... what proportions should I mix?

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    alveopora
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    Does that solution have any shelf life? Or is it best to get rid of it within a few days?
    Don

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    Well, 2 fld oz = 59.14705913 mL Iodine Tincture

    59.1471 mL / 473 mL = 0.125047 mL Iodine Tincture / mL of water

    50mL x 0.125047mL = 6.252 mL Iodine Tincture / 50 mL water

    I would make up a new bach each time I use it.
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    Excellent, Thanks Boomer!
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    Sounds good to me I'll try it Boomer,My ORP probe is past due! Thanks.
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    ORP, conductivity, disolved oxygen

    hi, should i monitor ORP (what is that), conductivity, disolved oxygen for a 120gal reef tank? the answer will tell me if i should spend 299 or 499 on a neptune controller

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    You do not need to monitor ORP unless you are using Ozone. However, if you did use one without Ozone it would teach you a few thing on ORP and why and how it shifts the ORP when you do things. ORP = Oxygen Reduction Potential.

    ORP and the Reef Aquarium
    http://reefkeeping.com/issues/2003-1...ture/index.htm




    conductivity = The salinity of the tank. A value of 53 mS = 35 ppt = 1.0264

    Using Conductivity to Measure Salinity
    http://www.aquariumfish.com/aquarium....aspx?aid=1804


    dissolved oxygen= Not needed but if one has money to spend it is a nice toy.

    The Need to Breathe, Part 3: Real Tanks and Real Importance (oxygen issues)
    http://reefkeeping.com/issues/2005-08/eb/index.php
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