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  1. #1
    Extreme Koi Member Rank = Hassai davec's Avatar
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    Can you get a purifier cartridge to help raise kh

    Don’t know if there’s such a thing but wouldn’t it be good if you could get a cartridge to put in a purifier that raises the kh of your water my kh from my tap is really low constantly battling to keep a descent kh my ph is usually 7.2 to 7.5



  2. #2
    Extreme Koi Member Rank = Supreme Champion Frimley Koi keeper's Avatar
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    Don't know about that but I know the Finer Filter ones make great sprinklers for your patio no mater how much you try to seal the buggers up

    Have a word with Vyair as they may know what's possible as you may want an RO set up (just guessing here)

    https://www.vyair.com/domestic/filters.html

  3. #3
    Extreme Koi Member Rank = Hassai davec's Avatar
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    Doesn’t Ro water decrease the kh

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    Extreme Koi Member Rank = Supreme Champion Frimley Koi keeper's Avatar
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    Quote Originally Posted by davec View Post
    Doesn’t Ro water decrease the kh
    Sorry that's why I put I'm guessing in brackets.

    Would still speak to Vyair as they are helpful

  6. #5
    Member Rank = Nisai davet's Avatar
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    I am no expert but I would imagine that you would need some form of bicarb dosing system linked to a ph monitor to dose the pond when the ph begins to drop. Plenty of people on here use this type of buffering, check mankey Sankey site too as he is the god of all things water.

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  8. #6
    Extreme Koi Member Rank = Hassai davec's Avatar
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    Where and can you get an auto bi carb dosing system


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    Member Rank = Nisai davet's Avatar
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    If you look in the reverse osmosis/ro section of the forum, people who use dosing systems go into great detail on setup,cost etc. You should find all the info you need there as its commonly used in conjuction with ro systems.

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  11. #8
    Extreme Koi Member Rank = Hassai davec's Avatar
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    Ol thanx i will look

  12. #9
    An automatic dosing system can be built using a pH controller and a dosing pump feeding a strong solution of sodium bicarbonate from a storage tank but these systems need to be monitored regularly and recalibrated as they lose accuracy. All pH measuring systems need the probes to be cleaned frequently and to be regularly recalibrated. Very expensive systems need less frequent recalibration than the cheaper systems so don't buy on price unless you're prepared to recalibrate frequently with the cheapest ones.

    I'm regularly asked about controlling pH and KH where there is a soft water supply. I advise against shells etc. because they are hit and miss. They only dissolve if there is carbon dioxide in the water due to insufficient aeration or if the pH has fallen below 7 and a pH crash has begun.

    I suggest that a very simple solution to combat falling KH would be to add sodium bicarbonate daily when you first feed the koi. All you would need to do is add a fixed amount of sodium bicarbonate regularly for a week (longer would be better) and monitor how much you needed to add in order to keep the KH at a constant value. Then simply divide the amount down and add the appropriate daily amount each day with the first feed.

    There is no need to measure the amount very accurately; if you keep a tub of sodium bicarbonate and a suitable measure e.g. a teaspoon or egg cup by the tub of food, this will soon become second nature. Then, each time you check your KH, if it isn't spot on your preferred value, you make small adjustments in your daily dose.

    I suggest trying that method for a while to see if it's an acceptable solution, if it isn't, then sell a kidney and buy a good quality pH monitor and peristaltic dosing pump but don't forget that you will still need to monitor the pH and KH and recalibrate.

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  14. #10
    Extreme Koi Member Rank = Supreme Champion Frimley Koi keeper's Avatar
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    Great information Manky and love the sell a kidney bit lol

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  16. #11
    Member Rank = Nisai davet's Avatar
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    Agree with frim excllent info once again manky

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  18. #12
    Extreme Koi Member Rank = Supreme Champion Davej's Avatar
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    As a matter of interest what is the KH of the supply and how are you measuring it?

  19. #13
    Extreme Koi Member Rank = Hassai davec's Avatar
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    Kh from the tap is 2 I’ve measured it with the my labs test and the columbo test both exactly the same

  20. #14
    Extreme Koi Member Rank = Supreme Champion Davej's Avatar
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    Quote Originally Posted by davec View Post
    Kh from the tap is 2 I’ve measured it with the my labs test and the columbo test both exactly the same
    If you can manage the pond to a similar level through a little bicarb or water exchange then you are in a place a lot of Koi keepers would like to be.

  21. #15
    Extreme Koi Member Rank = Hassai davec's Avatar
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    Quote Originally Posted by Davej View Post
    If you can manage the pond to a similar level through a little bicarb or water exchange then you are in a place a lot of Koi keepers would like to be.
    Thanx I’ve been managing the kh with kusuri bio balance I’m adding daily at moment if o could achieve 4 with the drop test I’d be happy at that and test regular and add the bio balance when needed when that’s gone il purchase some bi carb


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  23. #16
    Extreme Koi Member Rank = Supreme Champion john1's Avatar
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    Hi Davec, I am similar to you with zero kh and manage as per Mankys thread.
    I have a scoop of a known size and add one every week which keeps mine at 3 to 4.
    Took a bit of fiddling and testing to get there but now I only check now and again.
    John

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  25. #17
    Extreme Koi Member Rank = Hassai davec's Avatar
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    Quote Originally Posted by john1 View Post
    Hi Davec, I am similar to you with zero kh and manage as per Mankys thread.
    I have a scoop of a known size and add one every week which keeps mine at 3 to 4.
    Took a bit of fiddling and testing to get there but now I only check now and again.
    Have you a link to Mankys thread on kh


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  27. #18
    There you are. You can even work out the correct dose rate for sodium bicarbonate if you wish:
    Alkalinity

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  29. #19
    Extreme Koi Member Rank = Hassai davec's Avatar
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    Thank you so much i have printed that off and il read through it ��
    Last edited by davec; 31-03-2019 at 11:21 AM. Reason: mistake

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  31. #20
    Extreme Koi Member Rank = Hassai davec's Avatar
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    So have I worked this out correct current kh 2 dkh or 35.735 ppm target 5 dkh or 89.437 ppm so to round it up 90 - 35=55 so that’s 55 Grammys per 100 litres I’ve been using the kusuri bio balance and on pack it says to dose at 25 Grammys per 1000 gallons I’ve been using 100 Grammys and if my calculation is right and it’s per 1000 litres not gallons as on the pack I should be using 220 grammes of it per 1000 gallons kusuri must of made a mistake where it says 25 grammes per 1000 gallons it should be 25 grammes per 1000 litres


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