One too many Osmocote tablets!
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Old 04-20-2013, 05:28 AM   #1
devilduck
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One too many Osmocote tablets!


I think I've added one too many Osmocote gel tablets into my substrate over the course of the last couple of weeks. I'm getting consistent 40-80ppm nitrate reading on my API test, even after 2 days of 70-80% water changes.

None of the fauna in the tank are showing any out word signs of stress yet, even the most sensitive, GBR and bamboo shrimp, look fine.

I've since added Nitri-zorb and purigen to my filter to help out.

Question is should attempt to remove the extra Osmocote or sit it out with more water changes? I'm afraid of causing an even large spike in ammonia and or nitrate if I disturb the substrate (Safe-t-sorb).
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Old 04-20-2013, 05:38 AM   #2
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I'm subscribing to this. I started using those tabs size "00" on my 55g and I'm curious to know when and how much to add as well
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Thanks for your time
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Old 04-20-2013, 06:42 AM   #3
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Do more water changes and add some floaters and fast growing stems.
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Old 04-20-2013, 09:53 AM   #4
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I have the same issue, subscribed
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Old 04-20-2013, 12:41 PM   #5
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Some duckweed should suck that up real fast.
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Old 04-20-2013, 01:56 PM   #6
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Glad to know I'm not the only one with this issue!

I have some frogbit, but this floater never did well for me. I think some of my fish like to nibble the roots. The tank is I say medium level planted mostly crypts.

So removing trying to remove the osmocote is definitely a bad idea?
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Old 04-20-2013, 03:00 PM   #7
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Quote:
Originally Posted by devilduck View Post
Glad to know I'm not the only one with this issue!

I have some frogbit, but this floater never did well for me. I think some of my fish like to nibble the roots. The tank is I say medium level planted mostly crypts.

So removing trying to remove the osmocote is definitely a bad idea?
Yup. You'll cause an ammonia spike stirring up the substrate. Frogbit doesn't tolerate flow so well unless it has already formed a dense mat on the surface. Dwarf water lettuce is also a great nitrate sucker. I use both in my shrimp tank to keep the nitrates down. The crypts will actually grow larger when shaded so keep that in mind.
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Old 05-02-2013, 05:33 PM   #8
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Just an update, we're heading into week 3 and my nitrates are still in the 80ppm+ range. Unfortunately, it seems that my tap water has 5ppm of nitrate straight from the tap.

I've increased my lighting period by an hour to give more grow time for the plants, to help out. I'm only using 1 bulb of a 2 bulb 24w T5HO light that is sitting about 15-18 inches from the substrate.

Tonight I'm going to try a very good filter cleaning (I've been doing quick ones just barely squeezing out the sponges) and another 50% water change.

Luckily there still seems to be no obvious signs of distress with the fauna and no losses.
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Old 05-02-2013, 07:38 PM   #9
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You might try a different test kit. My API kit is wildly inaccurate.
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Old 05-04-2013, 05:28 AM   #10
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http://www.plantedtank.net/forums/sh...d.php?t=122085

maybe this will help
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Old 05-06-2013, 02:23 AM   #11
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Thanks happi. Did you wind up having to replace all your substrate?

Other than 80ppm nitrate, I am not showing any ammonia nor nitrite, ph with co2 is around 6.7.
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Old 05-06-2013, 04:15 AM   #12
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I'm dealing with this right now. I decided to try some osmocote in one of my tanks (90 gallon). This particular tank was doing great, monthly 30% water changes with nitrate at around 20 ppm before each water change. Plants were doing great, but I decided to try some osmocote tabs to boost growth in some of my root feeders because I can't leave anything alone. I stuck about a dozen tabs into the substrate near my root feeders. Within a few days, I lost 3 otos and found 200+ ppm nitrates (off the scale).

So now I've been doing 70-80% water changes every day for around 2 weeks just to keep my nitrates around 40-60ppm. I hope it levels out soon because I'm getting REALLY tired of water changes.

This is my first and last experience with any kind of ferts. Fish poop has been working great for me, and I'll stick with it in the future.
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Old 05-06-2013, 06:06 PM   #13
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Quote:
Originally Posted by devilduck View Post
Thanks happi. Did you wind up having to replace all your substrate?

Other than 80ppm nitrate, I am not showing any ammonia nor nitrite, ph with co2 is around 6.7.

far as i could remember i had to pull out much as i could, but in the end ended up replacing the whole substrate. i wouldn't worry about ammonia at lower ph, less than 7.
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Old 05-15-2013, 04:40 AM   #14
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Update: A month and a half later I am finally seeing a drop in nitrates. I'm down to about 40ppm. I've increased light levels, co2, and time.

So far I've only lost one fish, my last tiger barb, our of my original dozen. I'm not sure if it was due to old age or the higher nitrate levels or perhaps a combo.
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Old 05-15-2013, 02:56 PM   #15
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Quote:
Originally Posted by Indychus View Post
I'm dealing with this right now. I decided to try some osmocote in one of my tanks (90 gallon). This particular tank was doing great, monthly 30% water changes with nitrate at around 20 ppm before each water change. Plants were doing great, but I decided to try some osmocote tabs to boost growth in some of my root feeders because I can't leave anything alone. I stuck about a dozen tabs into the substrate near my root feeders. Within a few days, I lost 3 otos and found 200+ ppm nitrates (off the scale).

So now I've been doing 70-80% water changes every day for around 2 weeks just to keep my nitrates around 40-60ppm. I hope it levels out soon because I'm getting REALLY tired of water changes.

This is my first and last experience with any kind of ferts. Fish poop has been working great for me, and I'll stick with it in the future.
Wow. I need to be careful too. I just ordered a load of osmocote plus. I'm gonna need a lot more plants.
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