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  1. #1

    High PH and Nitrate levels following move to ProfiClear Compact filter

    Hi All,

    I had a new ProfiClear compact filter installed 4 weeks ago. Although the water quality has been great, i have noticed a large increase in fizz/bubbles. Having tested the water based on API kit, the readings are as follows;

    pH - 7.6
    pH high - 8.4

    Nitrate No2 - 2.0ppm
    Nitrate No3 - 20ppm

    Could you please kindly advise how i can bring these levels down to an appropriate level?

    Thanks in advanced



  2. #2
    Member Rank = Nisai pfrosty's Avatar
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    I don't know a great deal about RDFs but it sounds like the bio side of your filter is not mature enough to deal with nitrites.
    Regular water changes, seeding the filter and reduced feeding will help reduce nitrite levels. Also transferring some of the media from your previous filter will help mature the new bio.
    I wouldn't say your pH is dangerously high
    What are your ammonia readings?
    Last edited by pfrosty; 02-10-2020 at 08:23 AM.

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  4. #3
    Moderator Rank = Supreme Champion Feline's Avatar
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    Hi d-sol what is the ammonia level? Did you use test strips to get this result or a liquid drop kit?
    Are there fish in your pond, and how are they doing?
    A nitrite of 2 is very high and needs sorting. Daily water changes of around 20% using dechlorinated water are needed if there are fish in there, before they succumb to blood poisoning.

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  6. #4
    pfrosty, Feline - thanks both. I am using the liquid drop kit. Ammonia level shows 0.50ppm. Would you say this is due to my bio filter yet to be being established? It is approaching a month now. I don't have any koi, 2 large gold fish and 30-40 smaller gold fishes.

    Noted regarding the water changes, is there anything else i can do such as pond treatments?

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    Quote Originally Posted by d_sol View Post
    pfrosty, Feline - thanks both. I am using the liquid drop kit. Ammonia level shows 0.50ppm. Would you say this is due to my bio filter yet to be being established? It is approaching a month now. I don't have any koi, 2 large gold fish and 30-40 smaller gold fishes.

    Noted regarding the water changes, is there anything else i can do such as pond treatments?
    Yeah it sounds like your bio filter is not yet up to speed. You will find it takes quite a while to get established at this time of year if you’re in the UK and not heated.
    Water changes will help. Don’t add any more fish, and avoid feeding much also for now. Are your fish looking ok?

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  10. #6
    Quote Originally Posted by Feline View Post
    Yeah it sounds like your bio filter is not yet up to speed. You will find it takes quite a while to get established at this time of year if you’re in the UK and not heated.
    Water changes will help. Don’t add any more fish, and avoid feeding much also for now. Are your fish looking ok?
    Fish seem to hideing most of the time away from the centre of the pond which seems like they are either not used to the new filter/bio or its the nitrate/ph levels. I have realised that the pond has been topped up a number of times without dechlorinating the water, could this explain why i am see these nitrate levels?

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    Moderator Rank = Supreme Champion Feline's Avatar
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    Quote Originally Posted by d_sol View Post
    Fish seem to hideing most of the time away from the centre of the pond which seems like they are either not used to the new filter/bio or its the nitrate/ph levels. I have realised that the pond has been topped up a number of times without dechlorinating the water, could this explain why i am see these nitrate levels?
    Yes- any chlorine entering the pond is bad for the fish and also the establishment of your filter bacteria.
    Definitely make sure you dechlorinating from now onwards.
    What is your nitrite level now (nitrite is the important one not nitrate)?

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