Welcome to Koi Forum. Is this your first visit? Register
Page 1 of 2 12 LastLast
Results 1 to 20 of 23

Thread: High Ph

  1. #1

    High Ph

    Guys. My pond is 4500 gallons and is nearly 2 years old. Ph has always been spot on around 7.5. Today to my shock the ph test was dark blue in other words 9+
    Ammonia is zero along with nitrates. Another worry is the KH is zero too. Water looks crystal clear and the fish look happy. I want to add some bicarbonate to raise the KH but reluctant to do so due to the high Ph.
    We’re in the rainy season here so I would have thought that the Ph would be low not high……….. any ideas what it could be?

    Neil
    Attachment 38703Attachment 38704Attachment 38705


    Last edited by ndwgolf; 15-11-2021 at 09:13 AM.

  2. #2
    Added about 2kg of sodium bicarbonate 30 minutes ago. KH now 7 Ph back to 7.5. Hopefully that’s it…….. I will add another 2kg of Bicarbonate tomorrow……… I’m saying 2kg but I didn’t weigh it. This 2 Litre jug was filled to the top.

  3. #3
    Senior Member Rank = Supreme Champion Ajm's Avatar
    Join Date
    Mar 2018
    Location
    Durham
    Posts
    11,220
    Thanks / Likes
    21135
    That sounds a canny ph swing ??

    Sent from my SM-G973F using Tapatalk
    Freddyboy the legend

    "we are water keepers first"

    Johnathan

  4. #4
    Quote Originally Posted by Ajm View Post
    That sounds a canny ph swing ??

    Sent from my SM-G973F using Tapatalk
    In two years I’ve never seen the Ph above 7.5. And I tested it from the surface of the pond and also at the discharge of the bio filter system both were dark blue with zero drops on the KH
    KH has always been all over the place I recon I go through a quarter of a 25kg bag per month…..I’ve been lazy this last couple of weeks but it’s an eye opener to keep a better eye on it

  5. #5
    Senior Member Rank = Gosai Dom G20's Avatar
    Join Date
    Dec 2018
    Location
    Nottinghamshire
    Posts
    301
    Thanks / Likes
    491
    Just taking a wild shot at this but have you had a bloom in blanketweed?

    In summer when my pond gets a lot of sun the blanketweed can go a little mental. PH always seems to rise when this happens.

    I always have aqua source resolve on hand now.

    Other than that not entirely sure


    Sent from my iPhone using Tapatalk

  6. #6
    Quote Originally Posted by Dom G20 View Post
    Just taking a wild shot at this but have you had a bloom in blanketweed?

    In summer when my pond gets a lot of sun the blanketweed can go a little mental. PH always seems to rise when this happens.

    I always have aqua source resolve on hand now.

    Other than that not entirely sure


    Sent from my iPhone using Tapatalk
    Here is a wee clip of my pond taken 15 minutes ago. I don’t have any plants and no algae
    https://youtube.com/shorts/TUvA5MDg00g?feature=share

  7. #7
    Senior Member Rank = Supreme Champion Ajm's Avatar
    Join Date
    Mar 2018
    Location
    Durham
    Posts
    11,220
    Thanks / Likes
    21135
    Quote Originally Posted by ndwgolf View Post
    In two years I’ve never seen the Ph above 7.5. And I tested it from the surface of the pond and also at the discharge of the bio filter system both were dark blue with zero drops on the KH
    KH has always been all over the place I recon I go through a quarter of a 25kg bag per month…..I’ve been lazy this last couple of weeks but it’s an eye opener to keep a better eye on it
    I dose with bicarb as well as my sorce water is pretty much 0 kh . I didn't keep a eye last winter and lost half my pond all my big uns gone . . But am meaning with the first post was is 9+ down to 7.5 in the matter of minutes a bit much for the fish ??

    Sent from my SM-G973F using Tapatalk
    Freddyboy the legend

    "we are water keepers first"

    Johnathan

  8. #8
    Senior Member Rank = Jussai Djstiles999's Avatar
    Join Date
    Jan 2019
    Location
    Forest of Dean
    Posts
    1,327
    Thanks / Likes
    1859
    At 4,500 gallons I think you’ll find the maximum recommended dose to avoid shocking the fish is 450gms in one hit
    13,243 gallons, Filtreau HF30’s K1 capacity of 1,400l, Bakki Shower, BHM and understanding wife

  9. Thanks Ajm Thanked / Liked this Post
  10. #9
    Senior Member Rank = Jussai Spongebob's Avatar
    Join Date
    May 2020
    Location
    Manchester
    Posts
    1,281
    Thanks / Likes
    2324
    Quote Originally Posted by ndwgolf View Post
    Here is a wee clip of my pond taken 15 minutes ago. I don’t have any plants and no algae
    https://youtube.com/shorts/TUvA5MDg00g?feature=share
    Christ that stocking level looks like mine! Very nice mate
    Fibreglassed/5000 gals/4.5 m Tunnel/Spindrifter/Twin drums/Bio chambers/Beads/Showers/Remora ASHP

  11. #10
    Quote Originally Posted by ndwgolf View Post
    Ammonia is zero along with nitrates.Attachment 38703Attachment 38704Attachment 38705
    Do you mean nitrite? I'd be amazed if nitrate was zero with that stocking level.
    34,000L, 2xSpindrifters, Aqua Sieve2, Nexus300, 24in K1/bead, Momotaro Bakki, 17kwThermotec Inverter

  12. #11
    Senior Member Rank = Jussai Djstiles999's Avatar
    Join Date
    Jan 2019
    Location
    Forest of Dean
    Posts
    1,327
    Thanks / Likes
    1859
    Thinking about it bicarb would only take the ph down to 8.3 as that’s its natural level so it can’t go lower. Are you sure your test kit is not out of date or something? Assuming bicarb there is the same as bicarb here?
    13,243 gallons, Filtreau HF30’s K1 capacity of 1,400l, Bakki Shower, BHM and understanding wife

  13. Thanks Ajm Thanked / Liked this Post
  14. #12
    Quote Originally Posted by MalNorwich View Post
    Do you mean nitrite? I'd be amazed if nitrate was zero with that stocking level.
    Ive only ever tested for Nitrite..........It cam as part of the pond test kit from Amazon

  15. #13
    Quote Originally Posted by Djstiles999 View Post
    Thinking about it bicarb would only take the ph down to 8.3 as that’s its natural level so it can’t go lower. Are you sure your test kit is not out of date or something? Assuming bicarb there is the same as bicarb here?
    The Bicarb defiantly worked, it took the KH from zero to 7 if I remember rightly. Its 6 am here, I will check the water again in 30 minutes when its light

  16. #14
    Senior Member Rank = Jussai Djstiles999's Avatar
    Join Date
    Jan 2019
    Location
    Forest of Dean
    Posts
    1,327
    Thanks / Likes
    1859
    KH and PH aren’t the same, the bicarb would lift the KH, and the more you add the higher the KH will go but the PH of bicarb is 8.3 I believe so if you add a lot of bicarb it will move the ph up or down to 8.3. I’ve always read that you should be careful of KH and PH shock and adding the amount of bicarb to shift parameters by the amount you have in one go would seem to move them
    too quickly. If you add 450gms of bicarb to a 4,500 gl pond I think it would lift your KH by around 1 so by doing it at that rate you’ll lift your on safely. Depending on your ph level will dictate what will happen to your ph but it will slowly move towards 8.3 then regardless of how much you throw in it will stay at 8.3

    As an aside a KH of zero will normally be at risk of the water turning acidic, in other words ph going down not up
    Last edited by Djstiles999; 16-11-2021 at 12:13 AM.
    13,243 gallons, Filtreau HF30’s K1 capacity of 1,400l, Bakki Shower, BHM and understanding wife

  17. Thanks Ajm, john1 Thanked / Liked this Post
  18. #15
    Quote Originally Posted by Djstiles999 View Post
    KH and PH aren’t the same, the bicarb would lift the KH, and the more you add the higher the KH will go but the PH of bicarb is 8.3 I believe so if you add a lot of bicarb it will move the ph up or down to 8.3. I’ve always read that you should be careful of KH and PH shock and adding the amount of bicarb to shift parameters by the amount you have in one go would seem to move them
    too quickly. If you add 450gms of bicarb to a 4,500 gl pond I think it would lift your KH by around 1 so by doing it at that rate you’ll lift your on safely. Depending on your ph level will dictate what will happen to your ph but it will slowly move towards 8.3 then regardless of how much you throw in it will stay at 8.3

    As an aside a KH of zero will normally be at risk of the water turning acidic, in other words ph going down not up
    KH this morning was 5. Ph 7.5. When I checked yesterday 1 hour after adding the Sodium bicarbonate the KH was 7 Ph was the same 7.5.
    Before I left for golf this morning I added another 2litre jug of Sodium Bicarbonate and hopefully by the time I get home the KH will have settled around 10
    We have had a lot of rain so I’m guessing that maybe had something to do with it but if rain Ph is about 5 why would my initial check show 9+?
    I will update this afternoon after golf
    Neil

  19. #16
    Just checked the water again and the KH is 9 with the Ph at 7 to 7.5 Ammonia 0 to 0.25 Nitrites zero................All good Thanks

  20. Thanks john1 Thanked / Liked this Post
  21. #17
    Senior Member Rank = Jussai Djstiles999's Avatar
    Join Date
    Jan 2019
    Location
    Forest of Dean
    Posts
    1,327
    Thanks / Likes
    1859
    To reiterate that KH shouldn’t be raised too fast (I.e. not by 4 in one dose of bicarb) this link may help

    Alkalinity
    13,243 gallons, Filtreau HF30’s K1 capacity of 1,400l, Bakki Shower, BHM and understanding wife

  22. Thanks Ajm, john1, Manky Sanke Thanked / Liked this Post
  23. #18
    Extreme Koi Member Rank = Supreme Champion john1's Avatar
    Join Date
    Aug 2013
    Location
    N.Wales.
    Posts
    8,700
    Thanks / Likes
    15243
    DJ is right as he says.

    Manky Sanke is the man for this,but Neil the rain could have a lot to do with it and I think your pond will settle down when the rain stops.

    Keeping kh round 5 to 6 is fine in my book good luck with it Neil and well spotted.
    John

  24. Thanks Ajm, Manky Sanke Thanked / Liked this Post
  25. #19
    The Ph of my tap water is 5.5 to 6. KH is zero
    Ph of Peroni is bloody marvelous

  26. Thanks john1 Thanked / Liked this Post
  27. #20
    Quote Originally Posted by ndwgolf View Post
    The Ph of my tap water is 5.5 to 6. KH is zero
    Ph of Peroni is bloody marvelous



    Sent from my iPhone using Tapatalk

  28. Thanks john1 Thanked / Liked this Post
 

 
Page 1 of 2 12 LastLast

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT +1. The time now is 10:22 AM. Online Koi Mag Forum
Powered by vBulletin® Version 4.2.3
Copyright © 2024 vBulletin Solutions, Inc. All rights reserved.

vBulletin Improved By vBFoster® (Lite Version), © UltimateScheme, Ltd.