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  1. #1

    water/filter problem.

    Hi All, I have been having a problem with high nitrate levels, so I decided to change my filter from a kockney koi 3 stage to a nexus eazy pod.
    This season I started feeding the fish with medikoi probiotic, the fish love it, but I'm getting a lot of fine green algae in the water so I installed the eazypod. since then the nitrate has gone up to 20.0 this may be due to nps on the filter but I don't know what's causing the green gloop!
    I've put some EA pure + gel in the pod and a pond bomb in the pond, this mornings readings are.

    ammonia 0 nitrite 1.0 nitrate 20 ph 8 kh 5 gh 11
    pond is 5500 L with oase ecomax 11000 pump oase swimskim 25 evo 55 uv easypod filter.

    there are no plants in the pond & 10 fish 3 x 18" 5 x 14 2 x 10

    Do I have too many fish? I'm doing 10-20% water changes a couple of times a week & reduced the feeding to 10g on alternate days.

    Any advice would be greatly received.
    Thank you.



  2. #2
    Senior Member Rank = Yonsai KyKoi's Avatar
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    Quote Originally Posted by DoowickeyBob View Post
    Hi All, I have been having a problem with high nitrate levels, so I decided to change my filter from a kockney koi 3 stage to a nexus eazy pod.
    This season I started feeding the fish with medikoi probiotic, the fish love it, but I'm getting a lot of fine green algae in the water so I installed the eazypod. since then the nitrate has gone up to 20.0 this may be due to nps on the filter but I don't know what's causing the green gloop!
    I've put some EA pure + gel in the pod and a pond bomb in the pond, this mornings readings are.

    ammonia 0 nitrite 1.0 nitrate 20 ph 8 kh 5 gh 11
    pond is 5500 L with oase ecomax 11000 pump oase swimskim 25 evo 55 uv easypod filter.

    there are no plants in the pond & 10 fish 3 x 18" 5 x 14 2 x 10

    Do I have too many fish? I'm doing 10-20% water changes a couple of times a week & reduced the feeding to 10g on alternate days.

    Any advice would be greatly received.
    Thank you.
    Sounds like too many fish and not enough bio filtration IMO

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  4. #3
    Senior Member Rank = Hassai Sim's Avatar
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    I would say you are under filtered and over stocked, would have been better running your old filter and adding the pod to a skimmer.
    Your asking a lot of a pod a small nexus may have been better, you could add a barrel of media after the pod, maybe swap more water out to keep control of the nitrates

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  6. #4
    I agree, the maximum tolerable value for nitrite for koi is 0.2 mg/L so, if the best your biofilter system can manage, even with the assistance of water changes and filter boosters. is five times the tolerable level for nitrite, then you are definitely overstocked for that stage of maturity. Depending how long the Eazypod has had to mature so far, it may get a little better as it continues to mature but it doesn't appear that it will ever get the nitrite down to the optimum value of near zero so you will probably need to increase your biofiltration or move on some fish. In the meantime, unless you can get the nitrite to a stable value well below 0.2 mg/L, you should completely stop feeding as this will only add to the nitrite problem.

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  8. #5
    Definitely not enough bio you could make a bio chamber after your pod and add k1 media or get a baki shower

    Sent from my SM-A715F using Tapatalk

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  10. #6
    I think I need to move on some fish for the time being, the pod has only been in for 3 weeks, not enough time to mature for my pond. & will look at a k1 box after the pod.

    Sent from my ELE-L09 using Tapatalk
    Last edited by DoowickeyBob; 01-08-2021 at 07:27 PM.

  11. #7
    Senior Member Rank = Yonsai KevT's Avatar
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    Hi

    I think a DIY trickle filter is the answer as it will give a very much improved filtration system in the long term, they tend to mature very quickly in these water temps too

    KevT

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