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Old 01-12-2014, 05:03 AM   #351
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Originally Posted by aqua_chem View Post
You're right so far. In the linked paper, nitrite only got as high at .7 mM though (Figure 6), which converts to 32.2 ppm nitrite.

We picked up on the nitrobacter taking over at higher nitrites and surprising nitrospira a while back but maybe didn't go in to it in enough detail. Could explain why nitrobacter is the dominant bacteria in waste water plants. Problem is, there's not enough research on nitrospira as I think it's not been long since this bacteria became apparent for nitrification.

So we need to find more on nitrite toxicity or if it's doing any good having to switch from bacter to spira and back again if spira doesn't die. It must come back though or cycles wouldn't complete at all but it definitely could stall. But do we know at what levels this happens?
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Old 01-12-2014, 05:31 AM   #352
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One thing I also saw somewhere is that Nitrospira prefers low nitrites and high temps, where Nitrobacter prefers high nitrites and low temps.
It's very, very possible that we are building different bacterial colonies from each other when we choose different cycling techniques, that all accomplish the same thing in the end. It's interesting!

Here is the bit way back that Jen picked up on
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Old 01-12-2014, 05:40 AM   #353
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Ok I've just read the whole thread again from scratch. It really makes sense to me that we should dose lower ammonia less often and here why.

Less danger of nitrite toxicity (not fully proven but seems to be a recurring theme throughout the thread)

Less chance of creating nitrobacter rather than nitrospira (again we don't know what level nitrites make the happen)

Less chance of ph crash

Nutrients used slower as less to convert

Could be done with no water changes.

API test kit easier to read (not off the charts)

I know some of these aren't fully proven but ARE cause for concern so why not take precautions and dose less, 3 days apart for example.
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Old 01-12-2014, 05:48 AM   #354
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Will that still be good for full stocking?
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Old 01-12-2014, 06:14 AM   #355
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Will that still be good for full stocking?
I dont know, id have to look in to it. I think its going to be difficult to say how much ammonia the average tank produces. I think 4ppm was chosen as it was overkill. If we wanted to grow bacteria to a population that could convert 4ppm ammonia and subsequent nitrite I woukd suggest adding 4ppm ammonia but once a week. Since we understand the bacteria goes dormant.

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Old 01-15-2014, 05:46 PM   #356
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What the heck I didn't get any notifications (I must have missed it) I thought no one was saying anything!
Let me go catch up...
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Old 01-15-2014, 05:48 PM   #357
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Originally Posted by Caliban07 View Post
Ok I've just read the whole thread again from scratch. It really makes sense to me that we should dose lower ammonia less often and here why.

Less danger of nitrite toxicity (not fully proven but seems to be a recurring theme throughout the thread)

Less chance of creating nitrobacter rather than nitrospira (again we don't know what level nitrites make the happen)

Less chance of ph crash

Nutrients used slower as less to convert

Could be done with no water changes.

API test kit easier to read (not off the charts)

I know some of these aren't fully proven but ARE cause for concern so why not take precautions and dose less, 3 days apart for example.
I agree with everything you've said
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Old 01-15-2014, 05:48 PM   #358
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You're right so far. In the linked paper, nitrite only got as high at .7 mM though (Figure 6), which converts to 32.2 ppm nitrite.
So I'm reading the chart wrong? I see now it says uM so that's something different eh
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Old 01-15-2014, 05:58 PM   #359
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So I'm reading the chart wrong? I see now it says uM so that's something different eh

m is milli power minus 3 and u is micro to the power minus 6
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Old 02-12-2014, 09:38 PM   #360
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Check out aquaplaned app for iOS.
The water test charts are easy.
The guy who wrote the app was very accessible and seems willing to update his app or help.
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