too much calcium??

Discussion in 'Coral Health' started by bvb-etf-luva, Feb 3, 2011.

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  1. bvb-etf-luva

    bvb-etf-luva Banned

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    ok so i have been dosing calcium to my 90 gallon reef tank, i think i may be dosing a little much because i tested calcium yesterday and it was off the charts, im talking about 900 ppm. will this affect anything? is this harmful in any way should i try to bring it down?
     
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  3. 2in10

    2in10 Super Moderator Staff Member

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    It will make it very difficult to keep your alk up, and you will most likely have heavy deposition on your equipment. Water changes are the only way to bring it down fairly quickly. I would try to avoid dropping it more than 50ppm per day.
     
  4. bvb-etf-luva

    bvb-etf-luva Banned

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    my alkilinity is 125 ppm, i think thats pretty good. but will this high calcium take a toll on my corals and fish?
     
  5. steve wright

    steve wright Super Moderator Staff Member

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    +1 on above

    but also
    do you know your current Mag level? becuase elevated Mag levels can cause miss reading on test kits IME

    also get your test kit/ test results double checked before taking any action

    you will need to know what your DKH / Alk is
    because if that Calcium is correct, you may have a problem with severely low DKH

    Steve
     
  6. bvb-etf-luva

    bvb-etf-luva Banned

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    my mag is at 1500 ppm, also i tested it 3 times because i couldnt believe it and it was the same all the time. and my alkilinity levels are 125 ppm
     
  7. steve wright

    steve wright Super Moderator Staff Member

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    bvb

    it may be worth getting someone else, with a different test kit to verify the results
    if its a faulty test kit and you get same results 3 times, those results are questionable

    example learned from Habib CEO of Salifert

    test kits which are not tightly screwed down can evaporate, thus the contents become less diluted and can result in test kits giving false readings either high or low, depending on if the test reacts quickly or slowly to additions being made

    thus if your test kit is one that less drops = higher level - it may have a false high due to evaporation and thus more concentrated liquid being used

    just a good idea to get a 3rd party test kit involved to make sure you dont react to problems which are a problem with the test kit

    Steve
     
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  9. bvb-etf-luva

    bvb-etf-luva Banned

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    i have used several test kits on it, after i saw the results i was shocked and i went to the lfs got another 40 dollar test kit thinking mine was faulty got that one home had the exact results.
     
  10. steve wright

    steve wright Super Moderator Staff Member

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    OK

    So lets say the 900 PPM is accurate
    and that you have 1500ppm Mag
    and that 125 ppm = 7DKH

    whats your specific gravity at present?

    Steve
     
  11. bvb-etf-luva

    bvb-etf-luva Banned

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  12. steve wright

    steve wright Super Moderator Staff Member

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    OK

    done some reasearch on this subject - simply because that number 900 seems far to high

    but based on my findings - the numbers you are showing are in fact possible
    and dont always result in precipitation

    what you should not do
    do not add anything to increase the DKH above 8 - 7 is fine
    if you try and raise the DKH , you may end up with a snowstorm and carbonates falling out of solution and coating your heater, pumps etc

    do not add anything to increase PH - that also needs to remain at 8 or slightly under is OK

    do not add anything to increase calcium - stop dosing whatever it is you are dosing

    you have options

    1) a series of 20% water changes whilst ensuring the new water you make does not have DKH above 8 - as otherwise you could end up with a snowstorm when you add it to tank

    2) allow it to lower naturally with utilisation and in the mean time continue testing DKH and ensure this does not drop below 7

    Steve