Does NO3 degrade in solution over time? - The Planted Tank Forum
 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 04-12-2009, 03:00 AM Thread Starter
Grow little guys... grow.
 
i4x4nMore's Avatar
 
PTrader: (1/100%)
Join Date: Mar 2008
Location: Chicago, IL
Posts: 191
Does NO3 degrade in solution over time?

I'm curious how NO3 in solution can degrade over time (if it can)....

Here's what I experienced:
I went to test the nitrates in my tanks today. I usually test against a 5ppm reference solution so that I can calibrate my eyes to the testkit color. Thus, I keep a 5ppm reference solution in an amber Boston-round bottle on the shelf at room temp. I made this particular NO3 reference many months ago.

Today, when I tested my aquarium samples (and reference) with a new NO3 testkit, the reference solution showed 0ppm with the testkit.

Just to verify things, I made a new 5ppm reference solution and I also made a new batch of my KNO3 concentrate solution which I dose the tanks with. Then I tested the reference solution with the NO3 test kit and I also tested 10gal of water dosed to 5ppm with my KNO3 concentrate solution.

Both samples showed 5ppm with the test kit. So, I'm curious why the old 5ppm reference solution that I made several months ago no longer had any NO3 (that was detectable by the testkit)?

Is this type of degradation expected?

Cheers!

Jeremy Squires, Toronto, ON
One should never have to decide between chocolate, cake, or cookies.
i4x4nMore is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 04-12-2009, 04:11 AM
Planted Tank Guru
 
PTrader: (84/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 21,012
Potassum nitrate is just a salt, like sodium chloride, and a solution of either one will not degrade with time. Test kits are another matter, they degrade with time, and may even be bad when you buy them.

Hoppy
Hoppy is offline  
post #3 of 5 (permalink) Old 04-12-2009, 06:47 AM
Algae Grower
 
PTrader: (10/100%)
Join Date: Mar 2009
Location: Chicago
Posts: 132
If anything it gets stronger if any water evaporates out of the solution. Other wise no change to solution.
dp12man is offline  
 
post #4 of 5 (permalink) Old 04-12-2009, 07:45 PM Thread Starter
Grow little guys... grow.
 
i4x4nMore's Avatar
 
PTrader: (1/100%)
Join Date: Mar 2008
Location: Chicago, IL
Posts: 191
Thanks guys, that was my intuition, but just wanted to be sure.

Cheers!

Jeremy Squires, Toronto, ON
One should never have to decide between chocolate, cake, or cookies.
i4x4nMore is offline  
post #5 of 5 (permalink) Old 04-13-2009, 01:47 PM
Planted Tank Enthusiast
 
KevinC's Avatar
 
PTrader: (6/100%)
Join Date: May 2004
Location: Oshkosh, WI
Posts: 738
Bacterial/algae contamination likely used up the NO3. Did you make it with tap water? If so, that is a soup of things for bacteria to live on. Anaerobic environment of a closed bottle.

Kevin

72g bowfront planted, CO2, 4x - T5HO, Eheim 2213 and 2217, 2 angels, pristella tetras, blue tetras, betta, albino bristlenose pleco, albino cories. Sword, vals, hygros, ludwigias, java moss and fern, anubias

2g Mac-quarium. Clown gravel, fluorescent plastic plants, and 2 guppies.
KevinC is offline  
Reply

Tags
None

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome