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Plaster Of Paris Calcium Source

Discussion in 'Aquatic Plant Fertilization' started by redilyn, Apr 15, 2010.

  1. redilyn

    redilyn Junior Poster

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    Hi,

    Can someone give me an idea how much plaster of paris I would use to with magnesium sulfate to raise GH 1 degree?

    The msds for the plaster of paris says it contains the following:

    plaster of paris - 60-100%
    limestone - 10-30%
    crystalline silica - 0.5-1.5%
     
    #1 redilyn, Apr 15, 2010
    Last edited by a moderator: Apr 15, 2010
  2. redilyn

    redilyn Junior Poster

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    I guess I should give a little more info

    My tap water is 3dkh, 20ppm KH, and a ph of 6

    Since I don't know my calcium and magnesium levels I would like to raise the gh a bit to ensure im not short on either. This would be part of my EI dosing.

    I am using epsom salt for magnesium.
     
  3. Biollante

    Biollante Lifetime Charter Member
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    Information Please

    Hi,

    Along with the more information thing, the size of the tank helps. :)

    Generally, I recommend a GH booster but it is not necessary. ;)

    I can tell you that you cannot have only 20-ppm KH and 3 dKH, either you have 1.1 dKH or you have 51-ppm KH or so.

    Personally, I dose to raise my general hardness GH at each water change. :D

    Why don’t you start by telling us a little about yourself and your setup and what you are trying to accomplish?

    Except for me, almost everyone is friendly. :eek:

    Biollante
     
  4. redilyn

    redilyn Junior Poster

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    Opps, ya that would probably help a lot eh? It is a 55gallon.

    Ok, I'm confused now. I am willing to accept that my test kit is not accurate (nutrifin test kit). It also gives measurments in mg/l which I tried to convert to degrees. But the numbers I gave are what I am getting. I will give them again in mg/l.

    GH 60mg/l
    KH 20mg/l

    My water is from a sand point if that makes any difference.

    In the EI dosing sticky it mentions raising GH 1 degree to ensure calcium and magnesium are adequate. This is what I'm trying to do :)

    Its late here and I don't feel like typing to much but I will gladly provide more information about my setup later. I really like this forum (just found it recently) and plan to get more involved.

    Thank you for helping me again Biollante. BTW the cidex is working well :)
     
    #4 redilyn, Apr 15, 2010
    Last edited by a moderator: Apr 15, 2010
  5. redilyn

    redilyn Junior Poster

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    Ok, I feel totally dumb now... You are correct those numbers are not right....

    I mixed my test results for my tank & tap water tests. Lets just go with the results from my testing of the tank water and forgive me for my stupidity LoL.

    PH 6.4
    KH 40mg/l
    GH 60mg/l
     
  6. Biollante

    Biollante Lifetime Charter Member
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    KH GH Who Knew

    Hi,

    I sort of figured you got your KH’s and GH’s confused, had I been one of the decent folk around here, well… :eek:

    I would go with three-quarters to a teaspoon of the plaster of Paris and half to a teaspoon of Epsom Salts at each 50% or greater water change it will raise the general hardness to 6 or 7 dGH. It will make sure your plants, fish and snails are good and strong, if you are heavily planted and/or into gastropods use significantly more. :gw

    I am glad to hear the Cidex is working well. I cannot believe how much some of these outfits get for thing by marketing it to hobbyists. :p

    Good luck
    Biollante
     
  7. redilyn

    redilyn Junior Poster

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    Thank you again Biollante. Your help is always appreciated.
     
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