Advice needed

Discussion in 'Beginner Discussions' started by Pete, 16 Jul 2008.

  1. Pete

    Pete

    Joined:
    3 Apr 2008
    Posts:
    1,196
    Likes Received:
    6
    Location:
    Under the sea
    So the four foot tank has been running for a couple of weeks now. Did some tests on the water last night and :huh:

    Ph 8.3
    Kh has dropped to 6-7 ???????
    calcium 400
    magnesium 900 ??????

    can any body explain why my kh has dropped and how would I rectify this have dosed the local kh buffer after the test last night, and how do I get the magnesium up to the level it should be.
    Oh yes connected my phosphate reactor on sunday with the seachem phosguard in as the media would this have any effect on the kh.
     
    Last edited by a moderator: 16 Jul 2008
  2. AdS Guest




    to hide all adverts.
  3. Mike

    Mike Retired Moderator

    Joined:
    12 May 2007
    Posts:
    7,859
    Likes Received:
    30
    Location:
    the Motherland
    We will need more info Pete, what is in the tank at the moment? what is your lighting period? what time of the day did you take these tests? what were the previous results? what temp are you running? how long has the tank been running?

    It will give a background picture to the answers you seek.

    i'm guessing that the mag has gone down because the kh is low, but all can be rectified easily once we have the answers to the above.
     
  4. Pete

    Pete Thread Starter

    Joined:
    3 Apr 2008
    Posts:
    1,196
    Likes Received:
    6
    Location:
    Under the sea
    Hi Wee-Man the stock in the tank at the moment is

    2 x clowns
    1 x coral beauty
    1 x royal gramma
    1 x wrasse cant remember which one though

    some zoos and mushies a pin cushion, candy cane some type of leather
    +/- 25 - 30 kg live rock
    Have got 4 T5 lamps in first 2 come on at 13:30 and off at 22:30 and then the front two come on at 14:00 and go off at 22:00

    The tests were taken at about 17.30 yesterday afternoon and the previous tests were done on sunday afternoon and the Kh was on 9 magnesium was tested yesterday for the first time.

    The chiller on the tank is set at 25 so it runs between 24 and 26.

    Got the tank from a person that was leaveing the country and has been running for about a month now at my place, Did not clean out the sump when I got it so the sump was mature but would like to clean it out and change it a bit at a later stage.

    Do a weekly 20l water change.
     
  5. jacquesb

    jacquesb Retired Moderator

    Joined:
    29 May 2007
    Posts:
    17,868
    Likes Received:
    69
    Location:
    Cape Town
    Pete - have you perhaps noticed corralline algae growth? Corals, as well as corralline algae can use up the alkalinity in the water, as well as the magnesium.

    To increase the alkalinity, I would want to suggest start dosing with some sodium bicarbonate (baking soda), and/or sodium carbonate (washing soda)....

    I dose epsom salts to increase magnesium, but this should be increased automatically when you do water changes.

    Which brand of salt do you use, Pete? Have you changed salt brand perhaps?
     
  6. Pete

    Pete Thread Starter

    Joined:
    3 Apr 2008
    Posts:
    1,196
    Likes Received:
    6
    Location:
    Under the sea
    The person I got the tank from was useing Tropic marine so I used up what was left of it and am back to the salt I always use real ocean
     
  7. Mekaeel

    Mekaeel Moderator MASA Contributor

    Joined:
    8 May 2007
    Posts:
    24,229
    Likes Received:
    127
    Location:
    Point Waterfront Durban
    Hi Pete.Agree with Jacques. Also if you introduced new corals,expect you Ca and alk to drop as compared to what it was.
    Mag levels should be around 1300-1350.
    Alk between 6.5-8 DKH is fine.
    Real ocean is an excellent salt.
     
  8. Pete

    Pete Thread Starter

    Joined:
    3 Apr 2008
    Posts:
    1,196
    Likes Received:
    6
    Location:
    Under the sea
    Makaeel thats the prob no new corals added for a while
     
  9. Mekaeel

    Mekaeel Moderator MASA Contributor

    Joined:
    8 May 2007
    Posts:
    24,229
    Likes Received:
    127
    Location:
    Point Waterfront Durban
    Has coralline algea accelerated in your tank?
    What have you been dosing to keep up with your calcium and alkalinity demands?
     
  10. Pete

    Pete Thread Starter

    Joined:
    3 Apr 2008
    Posts:
    1,196
    Likes Received:
    6
    Location:
    Under the sea
    Mekaeel I have only been dosing the kh buffer(local product) to try and lift kh nothing else.
     
  11. Pete

    Pete Thread Starter

    Joined:
    3 Apr 2008
    Posts:
    1,196
    Likes Received:
    6
    Location:
    Under the sea
    Oh sorry have not seen any sudden growth
     
  12. jacquesb

    jacquesb Retired Moderator

    Joined:
    29 May 2007
    Posts:
    17,868
    Likes Received:
    69
    Location:
    Cape Town
    HHHhhhmm - clearly something in your tank is "using up" your magnesium and alkalinity.
    Alkalinity USUALLY gets depleted when the pH is out of balance, and when there are huge pH swings in the tank (the alkalinity is partly there to ensure that the pH does not swing TOO much).
    What exactly is the Alkalinity buffer that you are using? What does it contain?
    Perhaps you should try to use Sodium Bicarbonate (baking SODA) for a while. And see if this helps with the alkalinity issue.
    Once again, the magnesium should not be a problem, so I would not worry about that if I were you. Your magnesium should be replenished every time you do a water change.
     
  13. Warr7207

    Warr7207

    Joined:
    28 Dec 2007
    Posts:
    12,781
    Likes Received:
    31
    Location:
    JHB
    Jacques, I am personally finding Kalk, far better at handling pH/Alk issues.

    I have stop using BiCarb/baked Soda as with a CaRx high Alk is always my issues.
     
  14. jacquesb

    jacquesb Retired Moderator

    Joined:
    29 May 2007
    Posts:
    17,868
    Likes Received:
    69
    Location:
    Cape Town
    Warr - I still manually dose. I dose both sodium bicarb (once a week, on the weekend), as well as kalkwasser (nearly daily now - got a bit more corals and clams in the tank now that require more calcium)..... My alkalinity stays around 11 dKh, and my calcium levels between 420 and 460.....
     
Recent Posts

Loading...
Similar Threads - Advice needed Forum Date
Advice Needed for Sale of Tank General Discussions and Advice 16 Nov 2016
Importing an LED unit - Advice needed Technology 12 Sep 2016
Advice needed.What could this be? Quarantine Tanks, sick fish, QT corals 27 Jul 2016
First timer help and advice needed Beginner Discussions 26 Apr 2016
Brown algea advice needed.. Advanced Topics 8 Apr 2016
Advice needed Beginner Discussions 3 Dec 2015
Nano advice needed Biological/Natural Filtration and Deep Sand Beds 1 Oct 2015