Koi pond DISSOLVED OXYGEN METER

Little introduction to the DO9100. They sell from 80-180 dollars. I was lucky and got mine for 40.

[@stubbsaquatics6080]

Great job..

[@KoiRun50]

Good learning video. Enjoy your meter.

[@thekoiaddiction4740]

Thank you. It is a nice tool to have.

[@ARENESTOFARM]

thank you for the instructions it is very helpful.

[@stubbsaquatics6080]

Great.. I haven't used a D.O. meter in a very long time since I had trout farm.. This is way more high tech than the one I used 25 years ago..

[@thekoiaddiction4740]

So far seems to be a good little unit.

[@Carperama]

Is there a video on how to cal using the liquid? When I cal it in the liquid the % goes up over 300% and mg/l is 30 in the open air?

[@guhitmark9845]

Hi, I just want to ask for your help regarding this device. So my Do-9100 meter was having issues. Three of the four wires within the electrode interface was cut off, only the yellow one was still attached. The problem is I can't attach it back because I don't know which wire goes with which number. So the yellow one is on #4, but could you please tell me where red, black, and white wire goes? On 1, 2, or 3? Thank you in advance!😊

[@thekoiaddiction4740]

I wish I could help there but I have no idea. My best thought would be to google the wiring diagram of the tester and see what you can find. Sorry.

[@guhitmark9845]

@@thekoiaddiction4740 There's no wiring diagram of this device on Google. That's why I'm asking people who has this same device if maybe they can see the wires and what number are they connected to. It can easily be seen by loosening the screw of the electrode interface. But I don't want to bother anyone. Thank you so muchh

[@mohamadaama]

Hello Please help me sir Membrens when should be changed And how to keep it to next usage

[@jerolddomingo6517]

After using it, how you will fix it?

[@sekyanziosama2056]

Please i have but read different results

[@venenareligioest410]

Can you please tell me where to buy oxygen free water.

[@thekoiaddiction4740]

All water has oxygen…oxygen free water is hydrogen gas. H2O. So sorry to say you cant buy oxygen free water to my knowledge.

[@venenareligioest410]

@@thekoiaddiction4740 I am sure that I have seen people calibrating these devices using ‘oxygen free water’, in fact I thought you mentioned ordering some in your video (?). 👍

[@thekoiaddiction4740]

@@venenareligioest410 you mean calibration liquid. You can order it on amazon.

[@venenareligioest410]

@@thekoiaddiction4740 Yes, that’s it. Is it just called ‘calibration liquid’? Thanks for replying!

[@thekoiaddiction4740]

@@venenareligioest410 yes. DO meter calibration liquid. That should get ya what you are looking for.