Does Flourite Absorb and Stores Nitrate? - The Planted Tank Forum
 
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post #1 of 15 (permalink) Old 05-23-2008, 07:07 PM Thread Starter
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Does Flourite Absorb and Stores Nitrate?

I've been having a minor nitrate problem with the tanks that I have flourite in. Its like no matter how hard I try the nitrate readings are at least 10 ppm.

I vacuumed it, changed filter media, everything. I've been doing 40% water changes 3 times this week.

I heard nitrates store ferts and nutrients and I was wondering if the nutrients consist of nitrate.
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post #2 of 15 (permalink) Old 05-23-2008, 09:39 PM
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The first thing I'd consider is your test kit. Are you sure it's accurate? Have you tested your tap water? Does your tap water have nitrate straight from the tap?
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post #3 of 15 (permalink) Old 05-23-2008, 09:47 PM Thread Starter
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Quote:
Originally Posted by FrostyNYC View Post
The first thing I'd consider is your test kit. Are you sure it's accurate? Have you tested your tap water? Does your tap water have nitrate straight from the tap?
Yep, tap water shows 0 nitrate
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post #4 of 15 (permalink) Old 05-27-2008, 05:43 PM Thread Starter
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Anyone else has an opinion n this matter?
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post #5 of 15 (permalink) Old 05-27-2008, 06:05 PM
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No, flourite has no ability to absorbe N compounds. That is zeolite that can do that.

Ed: Maybe you have an overcrowded tank or a dead fish decaying.
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post #6 of 15 (permalink) Old 05-27-2008, 08:13 PM Thread Starter
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Originally Posted by emrextreme View Post
No, flourite has no ability to absorbe N compounds. That is zeolite that can do that.

Ed: Maybe you have an overcrowded tank or a dead fish decaying.
30 RCS isn't really crowded right?

It's not a fish tank so I doubt.
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post #7 of 15 (permalink) Old 05-27-2008, 08:43 PM
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You may add lemna minor temporarily till the tank settle into shape. Yet again I think 10ppm is a good value for a planted tank. I add extra nitrate to get 10ppm.
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post #8 of 15 (permalink) Old 05-27-2008, 08:43 PM
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Flourite itself will not store any N, however, mulm and decayed food, dead plant material etc can in all aquarium sediments.

I'd calibrate the test kit if you want to have any faith in a reading from it, and you seem concerned about NO3 and CRS's.

So do yourself a favor, make a set of calibration solutions before you think there's an issue when, in fact, there very well be nothing wrong.

It might be 10ppm, it might be 20ppm, it might be 2 ppm for all you know.

Regards,
Tom Barr




Regards,
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post #9 of 15 (permalink) Old 05-28-2008, 01:31 AM
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Here's a how-to for making comparison/calibration solutions https://www.plantedtank.net/forums/wa...-matching.html





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post #10 of 15 (permalink) Old 05-29-2008, 12:37 AM
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I've been told by someone in the hobby that flourite's clay particles are actualy used because they do hold nitrates. He recomended it to me as opposed to others that deplete their nutrience after a period of time.

I dont know for sure, this is just what he told me. He's owned his store and been in business for over 20 years, let alone be in the hobby.
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post #11 of 15 (permalink) Old 06-09-2008, 01:28 AM
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Flourite has a high CEC, cation exchange capacity, so it adsorbs the positive ions, not the negative ones. With KNO3, it would adsorb the potassium ions, but not the nitrate ions. You can't expect a LFS owner to be up to date on all things about planted tanks. Look at how hard it is for us to stay up to date and we all just sit around posting here. (Don't we?)

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post #12 of 15 (permalink) Old 06-09-2008, 01:54 AM
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What is a good nitrAte reading supposed to be? I know that the nitrItes should be 0.
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post #13 of 15 (permalink) Old 06-09-2008, 01:57 AM
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Depends on your lighting and plantload/plant species (how fast the plants are growing), but IMO 10-20 ppm is usually good.





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post #14 of 15 (permalink) Old 06-09-2008, 02:54 AM
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Directions for Making NO3 and PO4 Reference Solutions

You will need the following:
- 1 liter of distilled water
- 500 mL graduated cylinder
- 50 mL graduated cylinder
- 1 mL or 3 mL pipette or another measuring device to measure small mLs of solutions
- scales that are accurate to two decimal places
- KNO3 and KH2PO4 dry fertilizers.

Here's a way to make 10, 20, 30, 40 and 50 ppm NO3 reference solutions:

Add 0.70 grams of KNO3 to 429 mL of distilled water. This makes a 1000 ppm NO3 solution. (It's really a 1000.72 ppm NO3 solution.)

Add 2 mL of the 1000 ppm solution to 18 mL of distilled water. This makes 20 mL of a 100 ppm KNO3 solution.

Add 15 mL of the 100 ppm solution to 15 mL of distilled water. This makes 30 mL of a 50 ppm KNO3 solution.
Note: You can use this for the 50 ppm NO3 reference solution.

To make a 10 ppm NO3 solution:
Add 2 mL of the 50 ppm solution to 8 mL of distilled water. This makes 10 mL of a 10 ppm NO3 solution.

To make a 20 ppm NO3 solution:
Add 4 mL of the 50 ppm solution to 6 mL of distilled water. This makes 10 mL of a 20 ppm NO3 solution.

To make a 30 ppm NO3 solution:
Add 6 mL of the 50 ppm solution to 4 mL of distilled water. This makes 10 mL of a 30 ppm NO3 solution.

To make a 40 ppm NO3 solution:
Add 8 mL of the 50 ppm solution to 2 mL of distilled water. This makes 10 mL of a 40 ppm NO3 solution.




Here's a way to make 0.1, 0.2, 0.5, 1.0, 2.0, 3.0, 4.0 and 5.0 ppm PO4 reference solutions:

Add 0.70g of KH2PO4 to 489 mL of distilled water. This makes the 1000 ppm PO4 solution. (It's really a 999.04 ppm PO4 solution.)

Add 1 mL of the 1000 ppm solution to 9 mL of distilled water. This makes 10 mL of a 100 ppm PO4 solution.

Add 2 mL of the 100 ppm solution to 18 mL of distilled water. This makes 20 mL of a 10 ppm PO4 solution.

To make a 0.1 ppm PO4 solution:
Add 1 mL of the 10 ppm solution to 99 mL of distilled water. This makes 100 mL of a 0.1 ppm PO4 solution.

To make a 0.2 ppm PO4 solution:
Add 1 mL of the 10 ppm solution to 49 mL of distilled water. This makes 50 mL of a 0.2 ppm PO4 solution.

To make a 0.5 ppm PO4 solution:
Add 1 mL of the 10 ppm solution to 19 mL of distilled water. This makes 20 mL of a 0.5 ppm PO4 solution.

To make a 1.0 ppm PO4 solution:
Add 1 mL of the 10 ppm solution to 9 mL of distilled water. This makes 10 mL of a 1.0 ppm PO4 solution.

To make a 2.0 ppm PO4 solution:
Add 2 mL of the 10 ppm solution to 8 mL of distilled water. This makes 10 mL of a 2.0 ppm PO4 solution.

To make a 3.0 ppm PO4 solution:
Add 3 mL of the 10 ppm solution to 7 mL of distilled water. This makes 10 mL of a 3.0 ppm PO4 solution.

To make a 4.0 ppm PO4 solution:
Add 4 mL of the 10 ppm solution to 6 mL of distilled water. This makes 10 mL of a 4.0 ppm PO4 solution.

To make a 5.0 ppm PO4 solution:
Add 5 mL of the 10 ppm solution to 5 mL of distilled water. This makes 10 mL of a 5.0 ppm PO4 solution.

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post #15 of 15 (permalink) Old 06-09-2008, 02:59 PM
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After doing this, then you can test and worry about the NO3's and what they do and often do not mean............

Cost is about 30$ for ebay scales and glass/plastic ware.
If you are too cheap to do this, you might borrow some extra solution from someone here, or you can borrow some stuff etc(pay for shipping etc).

If you cannot do that and you are unwilling to buy the materials, then you should not bother with the question of "what are your NO3's" to begin with.
Do frequent large water changes, prune well, keep tank clean, good CO2 and dose afterwards to a known value(eg, EI type dosing).

Or go non CO2.

Regards,
Tom Barr



Quote:
Originally Posted by Left C View Post
Directions for Making NO3 and PO4 Reference Solutions

You will need the following:
- 1 liter of distilled water
- 500 mL graduated cylinder
- 50 mL graduated cylinder
- 1 mL or 3 mL pipette or another measuring device to measure small mLs of solutions
- scales that are accurate to two decimal places
- KNO3 and KH2PO4 dry fertilizers.

Here's a way to make 10, 20, 30, 40 and 50 ppm NO3 reference solutions:

Add 0.70 grams of KNO3 to 429 mL of distilled water. This makes a 1000 ppm NO3 solution. (It's really a 1000.72 ppm NO3 solution.)

Add 2 mL of the 1000 ppm solution to 18 mL of distilled water. This makes 20 mL of a 100 ppm KNO3 solution.

Add 15 mL of the 100 ppm solution to 15 mL of distilled water. This makes 30 mL of a 50 ppm KNO3 solution.
Note: You can use this for the 50 ppm NO3 reference solution.

To make a 10 ppm NO3 solution:
Add 2 mL of the 50 ppm solution to 8 mL of distilled water. This makes 10 mL of a 10 ppm NO3 solution.

To make a 20 ppm NO3 solution:
Add 4 mL of the 50 ppm solution to 6 mL of distilled water. This makes 10 mL of a 20 ppm NO3 solution.

To make a 30 ppm NO3 solution:
Add 6 mL of the 50 ppm solution to 4 mL of distilled water. This makes 10 mL of a 30 ppm NO3 solution.

To make a 40 ppm NO3 solution:
Add 8 mL of the 50 ppm solution to 2 mL of distilled water. This makes 10 mL of a 40 ppm NO3 solution.




Here's a way to make 0.1, 0.2, 0.5, 1.0, 2.0, 3.0, 4.0 and 5.0 ppm PO4 reference solutions:

Add 0.70g of KH2PO4 to 489 mL of distilled water. This makes the 1000 ppm PO4 solution. (It's really a 999.04 ppm PO4 solution.)

Add 1 mL of the 1000 ppm solution to 9 mL of distilled water. This makes 10 mL of a 100 ppm PO4 solution.

Add 2 mL of the 100 ppm solution to 18 mL of distilled water. This makes 20 mL of a 10 ppm PO4 solution.

To make a 0.1 ppm PO4 solution:
Add 1 mL of the 10 ppm solution to 99 mL of distilled water. This makes 100 mL of a 0.1 ppm PO4 solution.

To make a 0.2 ppm PO4 solution:
Add 1 mL of the 10 ppm solution to 49 mL of distilled water. This makes 50 mL of a 0.2 ppm PO4 solution.

To make a 0.5 ppm PO4 solution:
Add 1 mL of the 10 ppm solution to 19 mL of distilled water. This makes 20 mL of a 0.5 ppm PO4 solution.

To make a 1.0 ppm PO4 solution:
Add 1 mL of the 10 ppm solution to 9 mL of distilled water. This makes 10 mL of a 1.0 ppm PO4 solution.

To make a 2.0 ppm PO4 solution:
Add 2 mL of the 10 ppm solution to 8 mL of distilled water. This makes 10 mL of a 2.0 ppm PO4 solution.

To make a 3.0 ppm PO4 solution:
Add 3 mL of the 10 ppm solution to 7 mL of distilled water. This makes 10 mL of a 3.0 ppm PO4 solution.

To make a 4.0 ppm PO4 solution:
Add 4 mL of the 10 ppm solution to 6 mL of distilled water. This makes 10 mL of a 4.0 ppm PO4 solution.

To make a 5.0 ppm PO4 solution:
Add 5 mL of the 10 ppm solution to 5 mL of distilled water. This makes 10 mL of a 5.0 ppm PO4 solution.



Regards,
Tom Barr
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