Dosing ca, alk and mg

Discussion in 'Water Parameters and Additives' started by williet, 22 Jan 2013.

  1. williet

    williet Look at the shiny LEDs!!!

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    Hi guys

    So it has been a while my tank is matured (3years old) my SPS is colouring up and I have the most insane problem! I cannot raise my alk and ca !!! I will give it a massive dose and by tomorrow it is back where it was. I am aleead dosing a significant amount 10 - 16 intervals of 5 lms each on alk and on ca 60ml over 12 intervals. I am using a marine magic and this thing is going at about 30sec per interval so my doser I think is starting to take strain!! So what to do? I was thinking of increasing Randy's recipe concentration to double up on the concentration on both mixtures!

    Any advice? Anyone?
    I was even thinking of going the balling method (concentration is faaarrr higher)but then I don't have the trace elements?
     
    Last edited: 22 Jan 2013
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  3. RiaanP

    RiaanP Moderator

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    what is your KH reading
     
  4. williet

    williet Thread Starter Look at the shiny LEDs!!!

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    Ok

    Parameter

    Alk 6.7
    Ca 380
    Mg 1300

    I feel it is a bit low to close to the lower part of the range. Must say I know it is growth related as my corals are exploding with growth! Especially when I dose that extra alk and ca to get it to my ideal params which is

    Ca 420
    Alk 7.3

    Just cannot keep it there. Hence I think my mixture concentration is to low?
     
  5. Visser

    Visser MASA Contributor

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    My personal opinion would be that your sps corals are using up all the calcium & alk...
     
    Last edited: 22 Jan 2013
  6. williet

    williet Thread Starter Look at the shiny LEDs!!!

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    Mg 1300
    PH 8.3

    Lots of flow with lots of oxygen
    My seneye reef sensor even tells me my water oxygen content is excellent!
     
  7. mandarinman

    mandarinman

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    push your kh to at least 9 but ten is better. uploadfromtaptalk1358885735333.jpg imo

    uploadfromtaptalk1358885735333.jpg
     
  8. Visser

    Visser MASA Contributor

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    I remember when i saw adee's tank, he was dosing a continuous stream of alk from a container... Not even a doser, so it is very possible that your sps corals are absorbing more alk & cal than you can dose...
    Can you perhaps post a pic of your aquarium?
     
  9. williet

    williet Thread Starter Look at the shiny LEDs!!!

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    9dkh with LNS = disaster
     
  10. williet

    williet Thread Starter Look at the shiny LEDs!!!

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    Good idea! Will do that in the morning! I think that is the case as my Montis have about almost 5mm of white growth around the edges at all times. My acros are growing at about 1mm - 1.5 mm per day when I am dosing extra ca and alk! It slows down if i dont. my one monti plate grew 1cm in 3 days! Just worried my doser can't keep up! Maybe @Adee can give some guidance? I am thinking of firing up the old kalkstirrer. Just the only problem with that is it can push alk to high!
     
    Last edited by a moderator: 26 Nov 2015
  11. mandarinman

    mandarinman

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  12. Visser

    Visser MASA Contributor

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    I would rather go with a calcium reactor @williet, you can get much more dissolved calcium in the water that way...
    You can use the kallwasser reactor as a supplemental calcium dosing...
    Also, with the amount of alk & ca your corals are using, i dont thing a kalkwasser doser will be able to increase your alk high enough do any damage...
     
    Last edited by a moderator: 26 Nov 2015
  13. Visser

    Visser MASA Contributor

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    Wow, that sounds like some crazy growth!!!
    Would love to see that growth in my future sps only tank!!!
     
  14. mandarinman

    mandarinman

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    the calcium hydroxide or kalkwasser reacts with co2 pulling it out of the water to form carbonates/bicarbonates (kh) but at the same time it really pushes up your ph to scary levels. rather go with calcium chloride it is much more effective. you are getting stunning growth by the way. and dose bicarbonate to take care of kh. protea chemicals sells 25 kgs of calcium chloride for 150 bucks . same for bicarb and magnesium. ps i use redsea foundation abc. it is all three combined in a powder form on the ratios that coral uses. so i dose it during the week and test my water after waterchange and adjust where necessary
     
  15. Visser

    Visser MASA Contributor

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    Yep, when running ULNS, a high alk level causes alk burns on sps's growth tips which can be detrimental to the corals,..
    Alk in low nutrient systems should always be kept between 7-8 dkh
     
  16. Albert Terego

    Albert Terego

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    Firstly what are you dosing for alk and Ca and what is your system mater volume?

    You are probably adding too little Alk and Ca, but lets first do the calcs.
     
  17. williet

    williet Thread Starter Look at the shiny LEDs!!!

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    Done some calcs and I am consuming the correct amount of alk and ca in ratio. Problem that I had as stated initially is I can't keep up with dosing enough?

    Problem is I have now run out of ca test kit. So any further investigation will have to wait till Friday!
     
  18. mandarinman

    mandarinman

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    i have lns but 12 dkh. get nutrition in and nutrients out. burnt tips means corals trying to grow but not getting enough nutrition to do so.
     
  19. Visser

    Visser MASA Contributor

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    Yes & no... Just keep in mind that natural seawater has an alkalinity of 6-7dkh... So keeping dkh of 12 is almost double of what is naturally found...
    In aquariums with "low" nutrients (referring to detectable nitrates & phosphates) you wont have a problem with keeping high alkalinity as there is still enough nutrients to prevent alkalinity burns...
    But at ultra low nutrients, (undetectable levels of nitrates & phosphates, as found in oceans) the corals are more prone to alk burns...
     
  20. mandarinman

    mandarinman

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    yup the sea does have lower kh granted. but it is replenished all the time. the trick with having high kh is to have it with high magnesium and high calcium so that the ph is controlled. then you wont have burnt tips imo. if it is only one of the three that is up you will have problems. here is the perameter recommendations from redsea and this is what i am following and it works without any burning and my corals have growth and colour this is tried and tested stuff. i didnt make it up fortunately . but it is one of many options im sure. uploadfromtaptalk1358942805027.jpg

    uploadfromtaptalk1358942805027.jpg
     
    Last edited: 23 Jan 2013
  21. Express Reef

    Express Reef

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    Last edited by a moderator: 26 Nov 2015
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