My first time dosing

Discussion in 'Water Parameters and Additives' started by VicZA, 18 Oct 2014.

  1. VicZA

    VicZA

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    So I have bought my first "set" of DIY chemicals to begin dosing Ca, Mg and Alk and of course, I have a dosing unit (Jebao)

    What I am still not sure of is the following:

    1 - What ratio of chemical to you mix with RO water (I assume you use RO water) i.e. what concentrations do you need to aim for ?
    2 - How much should you dose in "one instance" - example if you need to do a daily dose of 30ml of a certain additive, do you set the doser to 1 x 30ml per day or do you do 6 x 5ml or what ?
    3 - Since the stuff will not be stirred, is there a chance that the chemical will start to settle as sediment or does it dissolve completely ?

    Any links or guidelines to the "practical" and "how to" side of dosing would be appreciated.
     
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  3. viper357

    viper357 Admin MASA Contributor

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  4. BennieV

    BennieV

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    Download a periodic table, get the molar mass of all ingredients. Get current water parameters. Work out what you need per liter.... Bla bla bla
     
  5. OP
    VicZA

    VicZA

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    Thanks ... I had a look at this and while it makes sense I still do not know how many ml of solution do I have to dose in order to raise Ca, Mg and Alk by a specific number. The "reef chemistry calculator" explains that you mix X amount of chemical with RO water and dose ....

    - does it not matter how much RO water you mix it with ?
    - if I do not want to measure out my required chemicals every day, how do I set up the automatic doser to work for say 1 week ?

    Let's use an actual example.

    Say for Calcium:
    - Current Ca = 420ppm and I have a daily consumption of 10ppm
    - to maintain 420ppm (and add 10ppm daily), I need to dissolve 11g of Calcium Chloride Flakes
    Hence :
    - how much Calcium Chloride Flakes do I add to 1 liter of RO water ?
    - how much ml must I dose in 1 day and not have to replenish the 1 litre solution ?

    Sorry, I am no scientist so need this explained very literally :m12:
     
  6. wouterloosman

    wouterloosman

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    It doesn't really matter. If you have to add 11g of Calccium flakes to maintain 420ppm. it's simple.

    If you dissolve 11gr of calcium flakes in 1 liter of RO water. You have to dose 1 liter a day to maintain 420ppm
    If you dissolve 110gr of calcium flakes in 1 liter of RO water. You have to dose 100ml a day to maintain 420ppm.
    If you dissolve 220gr of calcium flakes in 1 liter of RO water. You have to dose 50ml a day to maintain 420ppm.
    ....
    ....

    What happens in the end is: You start dosing. you measure CA, then after a week you measure again. If it went up you dose less, if it went down you dose more. Till you found the number of dosing to keep it stable.

    I normally make batches of 10 liter. So i don't have to mix new every week and I know my fluid is the same for the next 6 months.
     
    Last edited: 18 Oct 2014
  7. OP
    VicZA

    VicZA

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    Makes a lot of sense ... thanks so much !!
     

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