Thinking about (planted tank) things - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 07-11-2006, 02:28 AM Thread Starter
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Thinking about (planted tank) things

I was thinking about some things and maybe someone with some real brains can help.

I was told that nitrification takes a hit at low pH levels. (this is how this all started)
Nitrifying bacteria is what rids nitrates right?
So if I ran with a real low pH I would only have more nitrates right? Because of no nitrifying bacteria.

Ammonia is not toxic at these real low pH levels right?
So ridding the tank of nitrifying bacteria would be harmless with ammonia being less toxic? While keeping plants to gobble up the nitrate (or ammonia) the end result?

I am not really looking for an excuse not to change water add ferts or any other tank maintenance I am just looking to learn a few things.

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Last edited by Brilliant; 04-13-2007 at 12:35 AM. Reason: why not?
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post #2 of 6 (permalink) Old 07-11-2006, 02:34 AM
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Ammonia is toxic, ammonium is not.

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post #3 of 6 (permalink) Old 07-11-2006, 02:45 AM
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i think that above ph7 ammonium turns to ammonia and becomes toxic....
what kind of low ph are you planning on doing

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post #4 of 6 (permalink) Old 07-11-2006, 04:30 AM Thread Starter
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Is heterotrophic bacteria a free-living procaryote?

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post #5 of 6 (permalink) Old 07-11-2006, 07:45 AM
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This may be a stupid answer, but there are LOTS of different bodies of water...all with different PHs. Ocean is at 8.2-8.3, and they have bacteria. African Cichlids are similar...but freshwater. Godlfish I don't even know. And discus and other south american waters are low like 5-6 ph, and lower. The black arowanna can be found in waters as low as 4.5 ph. And I had a 30g long With 4 discus that i neglected for too long. and one day I checked the PH and it was 3.1ph. And all these biotopes have some sort of nitrifying bacteria. But lets face it the stuff in the ocean will die if you try to use it in the discus tank. It's different stuff. I would say it comes from the AIR. not the water, since it usually takes some kind of oxygenation to get the bacteria started. When you said "I was told that nitrification takes a hit at low pH levels." I think that what that means is that the current stuff in any given environment will begin to die off in a SUDDEN PH decline. But something else will eventually take it's place. thus never completely negating the nitrogen cycle. (then there is the concept of 0 ph)

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post #6 of 6 (permalink) Old 07-11-2006, 03:44 PM
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The nitrification process breaks waste down from ammonia to nitrite to nitrate. Ammonia is the most toxic and nitrate is the least toxic. Nitrification is reduced at ph below 5.5. While fish that prefer acidic water will be ok at low ph, it's not healthy for many fish to be kept at such low values.

Nitrification is a good thing in aquariums.
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