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Problem with Dosing KNO3

Discussion in 'Planted Aquariums' started by unseenone00, Feb 25, 2012.

  1. unseenone00

    unseenone00 AC Members

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    I got my dry ferts in today, which I was REALLY looking forward to since my tank has 0 nitrates, 2.0 phosphate - causing a major BGA uproar the last few weeks. The EI method recommended 3/4 tsp about 3x a week of KNO3. When I had about 4oz of water (1cup) I added in and mixed the KNO3, then proceded to test the mixture. The test was about 20ppm..... That seems very low. 72 gallon tank heavily planted will not have enough nitrates with this dosage, even if I doubled it I think. I have actually gained 18 rummynose tetras and 7 angelfish, about 2inch diameter bodies... but that has not helped the nitrates, still 0. (other then those fish, i have 2 full grown bosemani rainbows, 2 large serpae tetra(cant catch to move them), 2 ottos, and 3x 1" cories. :1zhelp::1zhelp::1zhelp: ...Tomorrow I will bring home a 5gallon bucket of water from a big sump system at the LFS I work at that ocasionally reaches 60-80 nitrates before we water change it. However I need more ideas!
     
  2. dundadundun

    dundadundun ;sup' dog? ;woof and a wwwoof!

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    http://calc.petalphile.com/

    1 1/4 tsp should give you about 20ppm no3 to start you off. following EI from there should keep you on track.

    your test was off. kit might be bad.

    3/4 tsp kno3 in a 1/2 cup (4 ounces) would give you 20219.69 ppm no3

    3/4 tsp in a cup (8 ounces) would give you 10109.84 ppm no3

    for a cup (8 ounces or half pint) use 0.0625 US gallons in the calculator linked above (16 cups to a gallon)

    for a half cup (4 ounces) use 0.03125 US gallons in the calculator (32 half cups in a gallon)
     
  3. unseenone00

    unseenone00 AC Members

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    "your test was off. kit might be bad."these words of yours probably just saved me $150 worth of fish... i pulled out this really old dry tab test kit... the new API master test kit is what is reading 0-3ppm.... the dry tab is reading over 100............................................... water changes galor!
     
  4. excuzzzeme

    excuzzzeme Stroke Survivor '05

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    http://www.aquariacentral.com/forum...o2-Fertilization-Algae-and-more-updated-10-10




    Hope it helps.
     
  5. SubRosa

    SubRosa AC Members

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    You do VIGOROUSLY shake bottle # 2 of the API Nitrate kit before using right? It contains powdered zinc that must be in suspension to give a reading. Failing to shake gives a "0" every time.
     
  6. constevens

    constevens AC Members

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    Yep!! this right here. If you actually have been mixing and dosing Kno3 as well as testing a solution you should show plenty. If you miss a step or dont do the Nitrate test right when using an API kit it will show incorrectly. If your API kit is new, I doubt its got an issue.
     
  7. unseenone00

    unseenone00 AC Members

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    i have been shaking it before each use, however maybe not enough, ill try that now
     
  8. unseenone00

    unseenone00 AC Members

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    i also was doing 30%-40% water changes with a hose/sink siphon to lower nitrates. i did 4 rotations, then checked using dry tab again (the last tabs) and was at about 70ppm. So i did one final 50% water change. When filling the tank back in, i thought the temp was fine- but it wasnt. I noticed ALL 17 of my rummynoses motionless on the bottom. After boiling water bit by bit, 1 is permanently dead, 13 are swimming alive and schooling. and the final 3 are MIA somewhere in the plants... sigh...
     
  9. unseenone00

    unseenone00 AC Members

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    10 min of vigorous shaking and it works. saved me some cash from buying strips, thanks
     

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