+ Reply to Thread
Page 1 of 3 123 LastLast
Results 1 to 10 of 21

Thread: huge nitrate spike after cleaning screen?

  1. #1

    Join Date
    Jul 2009
    Posts
    14

    huge nitrate spike after cleaning screen?

    have you ever noticed a huge jump in your nitrates right after you clean 1 side of your screen? i was at about 20ppm the yesterday and then i cleaned my screen today and tested about an hour later and i was at 110+. i am not really sure how it is even possible to go up that much in 24hrs but.... the only other thing i did in between testing was about a 12g water change which was with ro/di water and should have lowered the nitrates if anything.

    thanks for any help.

  2. #2
    kcress's Avatar
    Join Date
    Nov 2008
    Location
    Santa Cruz, California, USA
    Posts
    458

    Re: huge nitrate spike after cleaning screen?

    I have not done testing along those time lines. But, I have no problem imagining the nitrate moving that fast. The reason is because most established tanks have a huge bacteria excess. It is essentially completely limited by available ammonia. If something happens that spike the ammonia then all that bacteria is really to jump on processing it.

    Before I'd make any big decisions though I'd run the test again next cleaning cycle. You would easily see a change like that if something died in your tank. Any fish missing? Snails?

  3. #3

    Join Date
    Oct 2009
    Location
    Ottawa, ON, Canada
    Posts
    28

    Re: huge nitrate spike after cleaning screen?

    It is also possible that you disturbed the sand-bed when removed or added water and released materials into the water column which converted to nitrates. Test before and after your next screen cleaning and water change.

    John T

  4. #4
    Administrator
    Join Date
    Oct 2008
    Location
    Santa Monica, CA, USA
    Posts
    10,050

    Re: huge nitrate spike after cleaning screen?

    From my understanding though, the conversion to nitrate is not that fast. Ammonia to nitrite is fast, but to nitrate takes a while (days).

    Sounds like a measurement mistake.

  5. #5

    Join Date
    Jul 2009
    Posts
    14

    Re: huge nitrate spike after cleaning screen?

    all livestock in the tank is doing ok, and i tested it twice and got the same results. so last night i did a 25gal water change and shop vacced my sump and fuge that the scrubber is in just because when i changed water last time i stirred up a bunch of sediment/crap that was in the bottom of sump as i poured in the new water. didnt test yesterday but i will when i get home today and see how things are sitting.

  6. #6

    Join Date
    Jul 2009
    Posts
    14

    Re: huge nitrate spike after cleaning screen?

    here is the log i have kept for the last lettle while for my vodka dosing. it might give you a little better idea of what is happening. thanks again


    Date ------VDK Dose------Nitrate-------Phosphate---Water Change--------------Addatives
    Oct-15 1ml----------------110+-----no test
    Oct-16 1ml----------------110+-------5+----------------3gal
    Oct-17 1ml----------------110+-------5+
    Oct-18 1.25ml-------------110+------5+
    Oct-19 1.25ml-------------110+------5+
    Oct-20 1.25ml-------------110+------5+
    Oct-21 1.5ml--------------110+------5+----------------3gal
    Oct-22 1.5ml--------------110+------5+
    Oct-23 1.5ml--------------110+------5+
    Oct-24 1.75ml-------------110+------5+
    Oct-25 1.75ml-------------110+------5+
    Oct-26 1.75ml-------------110+------5+----------------3gal
    Oct-27 2ml----------------110+-------5+
    Oct-28 2ml----------------110+-------5+
    Oct-29 2ml----------------110+-------5+----------------6gal
    Oct-30 2ml-----------------20--------5+-----------------------------325g Phosphate Sponge
    Oct-31 2.5ml---------------20--------5-----------------8gal
    Nov-01 2.5ml---------------15--------4-----------------------------325g Phosphate Sponge
    Nov-02 2.5ml---------------15--------2.5-------------4.5gal
    Nov-03 2.5ml---------------15--------2----------------12gal
    Nov-04 2.5ml--------------[color=#FF0000]110[/color]--------2
    Nov-05 3ml------------no test---no test--------------25gal

  7. #7
    kcress's Avatar
    Join Date
    Nov 2008
    Location
    Santa Cruz, California, USA
    Posts
    458

    Re: huge nitrate spike after cleaning screen?

    Interesting numbers there.. Seems you have a digital tank! :lol:
    Be interested to see if it has started back down by now.


    Nitrate from nitrite is just as fast as nitrite from ammonia. Good thing too, as nitrite is considered a poison to fish just as ammonia is.

    Just look at a tank cycle. Ammonia spike to nitrite is the same period as nitrite to nitrate and that's in tanks with NO prior established bacteria. Once a tank is established its quite fast all the way around.

  8. #8

    Join Date
    Jul 2009
    Posts
    14

    Re: huge nitrate spike after cleaning screen?

    well i just went home and tested and i am still at 110 nitrate and phos has gone up to around 4ppm... not sure how things are staying high even with a nice water change. plus, i shut off pump and vacced out sump, ect. completely so when i was re-filling i did not stir anything up because there was nothing left to stir up. kinda sad today... might cry a little and see if that helps... any suggestions?

    can i safely keep with 20 gal a day water changes daily on a 120g tank until it clears up?

  9. #9

    Join Date
    Jul 2009
    Posts
    14

    Re: huge nitrate spike after cleaning screen?

    here are a few pist of my ats/sump setup.






  10. #10
    Administrator
    Join Date
    Oct 2008
    Location
    Santa Monica, CA, USA
    Posts
    10,050

    Re: huge nitrate spike after cleaning screen?

    Something must have died in the tank.

    Scrubber-wise: Post pics of the flow off the bottom.

    Light are on 18 hours?

+ Reply to Thread
Page 1 of 3 123 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts