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Thread: High nitrite/nitrate readings

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    Default High nitrite/nitrate readings

    i have a 72 gallon tank, 1" sand substrate, 2 years established. 9 adult discus. I am medicating with metro for a case of hex, mediating for 2 weeks, double dosage, twice a day. i do 60% wcs everyday. 2 - 2217 filters. my normal parameters are ph - 7.2 -7.6, ammonia - 0, nitrite - 0, nitrate <5. i changed out the filter floss over the weekend, not the media, from the canisters. i use aged water for w/cs. before a w/c, my nitrites are now running >1, nitrates >10, ammonia - 0. after a wc, nitrites - .25, nitrates <5. but they go right back up over night. i know i could be going through a mini cycle, but i have never had a mini cycle affect the nitrites that much. i use safe and according to seachem, i can 4 times the dosage in emergencies, which i am doing, to detox the nitrites.

    my questions - should i stop feeding the fish for a couple of days to reduce the nitrites?
    is the metro affecting the nitrites?
    can 1 of the fish with hex be affecting the nitrites?
    can i add anything to the tank, like stability?

    thanks for your help,
    jim
    Last edited by jim LI; 05-05-2017 at 07:49 PM.

  2. #2
    Registered Member HarryDk's Avatar
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    Default Re: High nitrite/nitrate readings

    hmm, i feel like you messed up your biofilter somewhere along the way? has there been any low PH reading? over clean filter media? anti-bacterial medication?
    i'm not sure if metro affect nitrate but metro is sugar base, will spoil the water quickly.
    Stability won't hurt but work or not, we never know :|,
    SAFE and PRIME are your best friend during mini cycle imo, more wc ... good luck.

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    Default Re: High nitrite/nitrate readings

    thanks,,,, i also tried aquarium salt, some posting say it will help with treatment... my nitrates shot up to 5 over night after the first dose of salt. so i stopped that. i also stopped metro and stability... i am going back to my normal routine.. 2 x dose of safe.....but it is now almost 3 weeks since i did the filter clean and i am still not back to normal.. can anyone suggest anything else i over looked? it is getting quite frustrating.

    thanks,
    jim....

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    Administrator and MVP Dec.2015 Second Hand Pat's Avatar
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    Default Re: High nitrite/nitrate readings

    Hi Jim, test your tap water.
    Pat
    Your discus are talking to you....are you listening

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    Default Re: High nitrite/nitrate readings

    Thanks Pat. Here are my reading

    Tap water - ph - 7. ammo - 0, nitrite - 0, nitrate -0

    Tank before w/c - ph - 7, ammo, - 0 , nitrite - >1, nitrate - 40

    aging barrel - ph - 7.6, ammo - 0, nitrite - 0, nitrate - 0

    tank after w/c - ph - 7.2, ammo - 0, nitrite - .25. nitrate - <5



    Jim

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