excess nitrate levels. - The Planted Tank Forum
 
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post #1 of 9 (permalink) Old 12-11-2011, 04:44 PM Thread Starter
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excess nitrate levels.

Hello.

My fishtank stats are as follows...

nitrite 0
Ammonia 0
Nitrate 40ppm
Ph 6.4 (when my pressurised co2 is on) making just above 30 ppm co2

Aquarium 400 ltr
4 x 54w t5
2 circulation pumps
1 fluval fx5

Ei dosing schedule :-

1 tsp kno3. 3 times a week
5/16 tsp 3/week
2 3/4 tsp mgso4 3/week

5/16 tsp trace 3/week

The trouble I'm having is I have 40 ppm nitrate a day after my weekly 50% wc.
(I dosed my usual macro solution on the day of the wc)


I was thinking of making up a new solution but leaving out the kno3 completely, whilst monitoring the nitrate levels)

Then u realised I would be cutting out a large portion of my potassium.

Is there sufficient potassium in kh2p04?



What do you guys recommend?

Mark
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post #2 of 9 (permalink) Old 12-11-2011, 05:02 PM
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You will get potassium out of it, but you'll get a HELL of a lot of phosphorus trying to get the needed potassium.

Do you have any K2SO4? I use this to get my K a little higher than just my KNO3 solution.
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post #3 of 9 (permalink) Old 12-11-2011, 05:11 PM
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how many gallon is your fish tank?

you said:
1 tsp kno3. 3 times a week (you might be adding too much N if tank is less than 50g)
5/16 tsp 3/week ??????????
2 3/4 tsp mgso4 3/week (6ppm of Mg is enough, sometime i don't dose any at all)

40ppm of N could be from many other things in the tank, test kits are not able to detect the correct amount anyway, so i would ignore the test results.

this is what i dose in my 50g 2x week in total numbers.

N 10-15ppm
P 1-2ppm
K 15-20ppm

csm+b 1/4tsp 2x week, 1/8 tsp Iron 2x week.

EDIT: missed the 400ltr part, so you have around 105g tank.

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post #4 of 9 (permalink) Old 12-11-2011, 05:14 PM
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don't judge the co2 by the 30ppm, it never works correctly. i judge my co2 by looking at the plants and the fish. drop checker is no longer accurate in my opinion.

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post #5 of 9 (permalink) Old 12-11-2011, 05:26 PM Thread Starter
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Hi thanks for the replies.

Yes it was kh2p04 I forgot to write in the list.


I don't have any k2so4 living in the uk it's not easy to get all these chemicals like you can in the us.

I tend to state my aquarium in litres so there is no ambiguity between us gallons/uk

M
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post #6 of 9 (permalink) Old 12-11-2011, 08:54 PM
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Add more fast growing plants.
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post #7 of 9 (permalink) Old 12-11-2011, 08:59 PM Thread Starter
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Quote:
Originally Posted by wet View Post
Add more fast growing plants.
Actually that's not a bad idea!

I've got a few like:-
Polysperma, water wisteria

But I've got more slower growers like crypts.


I will investigate

Thanks

Mark
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post #8 of 9 (permalink) Old 12-11-2011, 09:09 PM
wet
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Next trim, float some of those stems, then break off bits as it grows. Your nitrates and nutrients will drop fast. You might get some emergent growth to hide your piping and stuff, and your fish will like the plant cover.
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post #9 of 9 (permalink) Old 12-11-2011, 11:21 PM
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Before you do anything as a result of that nitrates test, be sure you have calibrated the test kit so you know its readings mean what they say. If you don't do that you don't know how much you have.

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