Kalk

Discussion in 'General Discussions and Advice' started by Dylant, 9 Aug 2014.

  1. Dylant

    Dylant

    Joined:
    4 Sep 2012
    Posts:
    508
    Likes Received:
    5
    Location:
    Fourways
    Hi anyone putting kalk in their ro resivour? Ie using the atu to dose kalk?
    If so can u explain the process?

    Thanks
     
  2. AdS Guest




    to hide all adverts.
  3. Gesiggie

    Gesiggie Challenge accepted

    Joined:
    2 Sep 2011
    Posts:
    2,151
    Likes Received:
    35
    Location:
    Potchefstroom
    Not too sure if this would work, as the kalk might settle at the bottom, and could potentially clog up your atu pump..
    But maybe someone knows a shortcut around this
     
  4. butcherman

    butcherman Moderator

    Joined:
    7 Sep 2009
    Posts:
    11,653
    Likes Received:
    284
    Location:
    Kempton Park
    I use to do this before i got a kalk reactor, make sure the pump is lifted off the bottom where the kalk settles and you will need to mix it up every now and then. You cn also look at the slurry method of adding kalk. I did mine this way so that the kalk would be added slowly. You do run the risk of running the atu dry with this method and kalk powered running through the pump also wears it down faster. if your willing to take these risks you're good to go.
     
  5. irie ivan

    irie ivan MASA Contributor

    Joined:
    6 May 2007
    Posts:
    3,451
    Likes Received:
    304
    Location:
    Bracken
    Have been running kalk via atu for years, current little via aqua going on two years and not guven uo the ghosf. It dangles in atu reseevoir, with a clothes peg keeping the power chord pinched to the reservoir, raising pump about 4cm off bottom.
    Just be sure to hVe atu pump on timer, slow drip rate and when mixing kalk, switch atu off for few hours.
     
  6. RiaanP

    RiaanP Moderator

    Joined:
    11 Aug 2008
    Posts:
    23,605
    Likes Received:
    1,356
    Location:
    Centurion
    Or use a kalk reactor. Put the kalk in there, have the ATU connected to the reactor. Set the ATU to rather run very short intervals multiple times a day. It pushes clean water into the reactor and saturated water out the top into the return chamber.
     
  7. OP
    Dylant

    Dylant

    Joined:
    4 Sep 2012
    Posts:
    508
    Likes Received:
    5
    Location:
    Fourways
    thanks guys, ill keeping looking into it, just worried about crashing my tank with this stuff.
     
  8. 4age

    4age

    Joined:
    23 Feb 2010
    Posts:
    3,653
    Likes Received:
    119
    Location:
    Cape Town
    just wondering...will it be possible to dose kalk saturated water through a dosing pump...like a few ml every few hours?
     
  9. RiaanP

    RiaanP Moderator

    Joined:
    11 Aug 2008
    Posts:
    23,605
    Likes Received:
    1,356
    Location:
    Centurion
    Not really, but it does sound plausible.

    Reason, the volume water needed to be saturated is more than a few ml.
    But best option is to use it via your RO top up, for in case the dosing pump add more water than the evaporation rate.
     
  10. RynoParsons

    RynoParsons

    Joined:
    11 Oct 2012
    Posts:
    656
    Likes Received:
    42
    Location:
    Pretoria
    Thini the dosing pump can get clogged up
     
  11. irie ivan

    irie ivan MASA Contributor

    Joined:
    6 May 2007
    Posts:
    3,451
    Likes Received:
    304
    Location:
    Bracken
    Huh.... @RiaanP???
    Saturated is saturated, 0.0000001ml of a saturated solution, is as saturated as 10000000L of a saturated solution.
    Connecting dosing pump to a float switch will ensure the top up amount is equal to the evaporation amount ;).
    A peri pump can clog with overly saturated kalk, doubt if it will with saturated... However, make sure your rubbers can handle the caustic nature of kalk and if there is a buildup, a rinse of the tubing with some ro and vinegar will clear it in no time... Sounds like work though.
    Connect dosing pump pre kalkstirrer is best.
     
    Last edited by a moderator: 26 Nov 2015
  12. RiaanP

    RiaanP Moderator

    Joined:
    11 Aug 2008
    Posts:
    23,605
    Likes Received:
    1,356
    Location:
    Centurion
    exactly my point.

    doubt if you will ever get the evaporation rate and the dosing pump top up rate equal. Taking winter and summer evaporation rates into account, drafts, fans, and what not else that can influence or change your evaporation rate.
     
  13. carlosdeandrade

    carlosdeandrade

    Joined:
    24 Dec 2010
    Posts:
    8,244
    Likes Received:
    229
    Location:
    North Riding, Jozi
    I used to mix 15ml (three teaspoons) of kalk in 5 litres of RO, let the sediment settle and then drip it slowly into my sump over night. Never had an issue with this, but that was when I only had 300 litres of water to care for. :p
     
  14. Nemeziz_za

    Nemeziz_za

    Joined:
    25 Sep 2012
    Posts:
    1,589
    Likes Received:
    42
    Location:
    Durbanville, (Cpt)
    So whilst kinda on topic --- but not really I have a slightly different question.

    After you've added your initial KALK powder to the ATU or Reactor.... when do you add more KALK powder? And do you throw out the residual powder at the bottom?

    First time user here....
     
  15. carlosdeandrade

    carlosdeandrade

    Joined:
    24 Dec 2010
    Posts:
    8,244
    Likes Received:
    229
    Location:
    North Riding, Jozi
    Eugene, it all depends on how much evaporation you have. If you are using a CARX then that should supply most of you Ca Hydroxide from your media and your stirrer should only be used to keep your pH in check and supplement any shortfalls. Try and dial in your carx before you add a stirrer. When you have done this you add minimal kalk to your stirrer.
    If you are only using a kalk stirrer I would add about 100ml, test your alk levels after 48 hours, if you it is not at the desired , add a little more. Unfortunately you will need to test to see how much you will need in the stirrer. When that has been established, make a mark on the stirrer.
    Remember, that seasonal changes can influence the amount of evaporation.
    I would clean out your stirrer every couple of months from the slurry that does not get dissolved.

    The key is to test often in the beginning so as to gauge your dosing.
     
  16. irie ivan

    irie ivan MASA Contributor

    Joined:
    6 May 2007
    Posts:
    3,451
    Likes Received:
    304
    Location:
    Bracken
    Adding more kalk to stirrer wont increase alk if evap rate not enough. Saturated is saturated.
     
Recent Posts

Loading...
Similar Threads - Kalk Forum Date
2 Part addition to Kalk Shortfall Water Parameters and Additives 14 Mar 2017
[wtd] Kalkstirrer KS150 Reef Octopus Wanted 30 Jan 2017
[wtd] Kalk Stirrer Wanted 6 Jan 2017
Diy kalkwasser dripper Anything DIY Related 22 Dec 2016
[wtd] Kalksterrer Wanted 18 Nov 2016
[wtd] Kalk stirrer or reactor Wanted 2 Jul 2016
[wtd] aqua medic kalk star Wanted 21 Apr 2016