Osmocote+ and Nitrates - The Planted Tank Forum
 
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post #1 of 2 (permalink) Old 12-04-2017, 07:26 PM Thread Starter
Algae Grower
 
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Osmocote+ and Nitrates

I have a heavily planted tank that is CYCLED with NO FISH. I used Amazonia LIGHT in this tank and at the bottom used a light sprinkling of Osmocote+ to give the plant roots a little boost.

My nitrates are higher than I would like approximately 20 to 30 ppm and I don't quite understand why with again, no fish. I have changed 70% of the water a half dozen times but the nitrates continue to come back in just a day or two to that level even though my tap water has less than 5 ppm nitrates.

I am not positive, but I think it the Osmocote+ must be affecting the nitrate level. Any opinion here as to what could possibly cause high nitrates beside Oscomote? Anyone here that uses homemade root tabs ever notice an increase in nitrates?
Would also appreciate thoughts on what to do with this tank, is it best to tear it down and start over or should I just go ahead and add fish, monitor and change water as often as possible?

Thanks in advance.

Last edited by RojoP; 12-04-2017 at 07:27 PM. Reason: Bad title
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post #2 of 2 (permalink) Old 12-04-2017, 08:03 PM
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I had the same issue a couple years ago setting up a tank with probably more osmocote than it needed. Took forever to get it to level out. So I would say that I agree with you what the cause might be, but we're still just working off a couple of anecdotes In your case though you're still low enough in nitrates that I would be comfortable adding fish, but I know lots of people who think that 20 is still too much. Decide what you're comfortable with and then I see no reason why monitoring and water changes as necessary to keep it where you want it wouldn't work out well for you.


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