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Thread: Yellowish Water

  1. #1
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    Yellowish Water

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    I had a 3ft x 1.5ft x 1.5ft Koi tank.
    I had choose 1200L/hr. Overhead filter but why my water still turn yellowish?
    I had change my pallet oso.

  2. #2
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    Re: Yellowish Water

    Where is your tank placed?
    How long did you on the light?
    Was there any substrate?

    Could you share a pic of your tank?


    Sent from my iPhone using Tapatalk

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    Re: Yellowish Water

    You may need to use aquarium charcoal/carbon to absorb the yellowing compound . You should use aquarium charcoal/carbon for up to 3 days only , else the yellowing compound might again be released back into the aquarium water .
    If you've learnt, teach, if you have, give.
    Don't walk behind me as I might not lead, don't walk in front of me as I might not follow. Walk beside me, as my friend.
    Mohamad Rohaizal is my name. If it's too hard, use BFG. I don't mind.

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    Re: Yellowish Water

    Fish tank was placed indoor.
    I seldom on the light (about few wk once)
    NO substrate inside my tank.

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    Re: Yellowish Water

    Quote Originally Posted by BFG View Post
    You may need to use aquarium charcoal/carbon to absorb the yellowing compound . You should use aquarium charcoal/carbon for up to 3 days only , else the yellowing compound might again be released back into the aquarium water .
    I did use charcoal but I place it 1 month.
    So every wk I ned to put in 1 new charcoal?
    I thought an healthy bio system e water won't turn yellowish although I don't know why my bio system not healthy

  6. #6
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    Re: Yellowish Water

    Quote Originally Posted by Lmhdogdog View Post
    Fish tank was placed indoor.
    I seldom on the light (about few wk once)
    NO substrate inside my tank.
    Was there filter? I only experience yellowish water in my fish tank that does not have filter. The reason was because the poo/uneaten food was left there and nature taking process.

    If its brown water, it could be from tannings or aqua soil yet to settle. For this, the solution will be purigen or activated charcoal. Purigen will need to be “recharged” on a monthly basis. Activated charcoal will need to be replaced on a monthly basis. If this is the cause, it will eventually be cleared even if u decided not to do anything


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    Re: Yellowish Water

    Quote Originally Posted by genki89 View Post
    Was there filter? I only experience yellowish water in my fish tank that does not have filter. The reason was because the poo/uneaten food was left there and nature taking process.

    If its brown water, it could be from tannings or aqua soil yet to settle. For this, the solution will be purigen or activated charcoal. Purigen will need to be “recharged” on a monthly basis. Activated charcoal will need to be replaced on a monthly basis. If this is the cause, it will eventually be cleared even if u decided not to do anything


    Sent from my iPhone using Tapatalk
    I did placed overhead rain filter with bio media.
    And I do change 50% water 2 times per wk.
    Tank inside did keep 10 pcs. 20cm koi

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    Re: Yellowish Water

    Quote Originally Posted by genki89 View Post
    Where is your tank placed?
    How long did you on the light?
    Was there any substrate?

    Could you share a pic of your tank?


    Sent from my iPhone using Tapatalk
    tank 2.jpg

    Ti's is my tank pics

  9. #9
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    Re: Yellowish Water

    The yellow water is from the drift wood. It tanning leaked. You will need to put purigen and change the filter wool.

    After awhile the water will be cleared


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    Re: Yellowish Water

    Quote Originally Posted by genki89 View Post
    The yellow water is from the drift wood. It tanning leaked. You will need to put purigen and change the filter wool.

    After awhile the water will be cleared


    Sent from my iPhone using Tapatalk
    My filter wool changing in daily basis ��

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    Re: Yellowish Water

    Not able to see the last 2 pic but no need to change on a daily basis. Once a month is fine.

    On a weekly basis, during water change, just rinse the filter wool with the tank water. This to wash out all debris/shit that have been collected.

    Just be patience. Rushing will not do any good.


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    Re: Yellowish Water

    Filter wool does not remove the yellowing compound in the water column . You need to use something to absorb this yellowing compound from the tank water . Use charcoal/carbon in a reactor for an efficient method as 100% of water have to go through the reactor by connecting it to a different pump . If you are using a reactor , do not let the carbon tumble in the reactor as it will grind down to dust particle and enter your display tank .
    If you've learnt, teach, if you have, give.
    Don't walk behind me as I might not lead, don't walk in front of me as I might not follow. Walk beside me, as my friend.
    Mohamad Rohaizal is my name. If it's too hard, use BFG. I don't mind.

  13. #13
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    Re: Yellowish Water

    Quote Originally Posted by genki89 View Post
    The yellow water is from the drift wood. It tanning leaked. You will need to put purigen and change the filter wool.

    After awhile the water will be cleared


    Sent from my iPhone using Tapatalk
    My tank got no drift wood and I had keep this fish almost a Yr. Which it was patient enough

  14. #14
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    Re: Yellowish Water

    I see. My bad as i did not see it properly.

    Then your only choice is purigen/charcoal to remove the yellowish water. Like bro BFG mentioned, filter wool will not do the job to remove the yellowish water. Filter wool is to trap the debris.

    Other than purigen and charcoal, alternative solution will be adding chemicals solution sold at fish shop that treats yellowish water.

    With my personal experience, adding fast growing submerged plants do help to remove the yellowish water as well.


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    Re: Yellowish Water

    Lmhdogdog , there is a new product in the market , it is a charcoal/carbon cube . I have not tried this product before , you might want to take a look at it ?
    If you've learnt, teach, if you have, give.
    Don't walk behind me as I might not lead, don't walk in front of me as I might not follow. Walk beside me, as my friend.
    Mohamad Rohaizal is my name. If it's too hard, use BFG. I don't mind.

  16. #16
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    Re: Yellowish Water

    Quote Originally Posted by BFG View Post
    Lmhdogdog , there is a new product in the market , it is a charcoal/carbon cube . I have not tried this product before , you might want to take a look at it ?
    I did try it b4 not working then I sold away, but I bought 2 block

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