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Lost Fish + Powerful Bio Filter = Large Nitrates?

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  • Lost Fish + Powerful Bio Filter = Large Nitrates?

    I'm posting this in a new thread so it won't take away from the other threads about the cycle, but I'm pretty sure I'm right on this:

    Reference: I cycled the tank with 2-3 ppm ammonia, as of Sunday it was cycled.

    Woke up this morning and my whiptail catfish was upside down. No sign of disease or injury, believe it was stress of a new tank, it happens sometimes, but as any good fish keeper, I did a water test.

    0 ppm ammonia
    0 ppm nitrite
    40 ppm nitrate?!

    I was quite confused, as the tank is moderately planted, I had done a 90% water change on Sunday and then a 20% change yesterday and hadn't seen nitrate spikes this high at all during the entire cycle.

    Is it possible that the fish death caused a large ammonia spike but the biofilter took it all out and just made it nitrate?
    ~Erin
    10g, 20g, 29g, 55g

  • #2
    Have you tested your tap water? I had one tank that had nitrate readings like that and my tank has a lot of plants also, but fortunately didn't lose a fish. Then it straightened out and now it runs around 15 or so.
    __________________________________________________ __________
    Lori

    30G, 5G

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    • #3
      Yep, my tap always runs 0/0/0.
      ~Erin
      10g, 20g, 29g, 55g

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      • #4
        Another idea may be the filter. Assuming during cycling it wasn't disturbed ie: cleaned. Maybe it is full of gunk, Canisters can be nitrate factories if dirty imo.
        __________________________________________________ _____
        Try not to be a man of success but a man of value. -Albert Einstein

        Wise men speak because they have something to say, fools because they have to say something. -Plato

        Say what you mean and do what you say. -Alot of people
        110G, 65G, 10, 300G Pond

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        • #5
          I did a wishy in tank water with the filter media yesterday, but should I have dumped the water out of the filter as well and refilled it?
          ~Erin
          10g, 20g, 29g, 55g

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          • #6
            If its a canister the nastiest stuff is at the bottom so I would definitely dump it. Otherwise, 40 ppm isn't too bad considering all the biological activity the tank has seen in the last few days. I would monitor it and see if it calms down after a few wc's.
            __________________________________________________ _____
            Try not to be a man of success but a man of value. -Albert Einstein

            Wise men speak because they have something to say, fools because they have to say something. -Plato

            Say what you mean and do what you say. -Alot of people
            110G, 65G, 10, 300G Pond

            Comment


            • #7
              Thanks Matt I'll dump it out in the morning.
              ~Erin
              10g, 20g, 29g, 55g

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              • #8
                sorry about your catfish...
                It does not matter if you are right or wrong...
                As long as you learn and Keep Moving Forward!

                ~Anthony

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                • #9
                  I'm really sorry to hear about your fish Rae.

                  Sorry to hijack but this canister talk is interesting

                  I should be emptying out my canister water??

                  News to me! Im going to do a big clean of my canister today, pipes included, I just have no idea how to LOL! helps me please
                  When tempted to fight fire with fire, remember that the fire department usually use water.

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                  • #10
                    How long have you been using a Canister?
                    It does not matter if you are right or wrong...
                    As long as you learn and Keep Moving Forward!

                    ~Anthony

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                    • #11
                      maybe 2 months? I cleaned the media out once and the spray bar once also.
                      When tempted to fight fire with fire, remember that the fire department usually use water.

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                      • #12
                        Whew... I thought I was the only canister noob... what were you using before a canister?
                        It does not matter if you are right or wrong...
                        As long as you learn and Keep Moving Forward!

                        ~Anthony

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                        • #13
                          well I used an internal filter with my old 29gal and then get a canister when I got my 63.5gal
                          When tempted to fight fire with fire, remember that the fire department usually use water.

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                          • #14
                            This is how I clean my cans guys: Take it out place on a towel, pull all media except sponges and floss and rinse in bucket of dechlor water. Toss the floss and squeeze out the sponges in the canisters 3 gallons or so it still has in it. Dump and rinse canister, replace all media, fill it up so when you put the top on a little water squirts out and you're back in business.
                            __________________________________________________ _____
                            Try not to be a man of success but a man of value. -Albert Einstein

                            Wise men speak because they have something to say, fools because they have to say something. -Plato

                            Say what you mean and do what you say. -Alot of people
                            110G, 65G, 10, 300G Pond

                            Comment

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