What ammonia PPM is bad, dangerous and catastrophic - The Planted Tank Forum
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post #1 of 2 (permalink) Old 11-25-2015, 05:21 AM Thread Starter
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What ammonia PPM is bad, dangerous and catastrophic

I know that the 0PPM would be ideal in a perfect world but what what amount is bad, dangerous and catastrophic( cut vacation short, book last minute flight back home to do an emergency water change)

I have the API test but no information on what these numbers mean.

Thanks.
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post #2 of 2 (permalink) Old 11-25-2015, 02:42 PM
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There really is no correct answer.

Each inhabitant has different tolerances to ammonia. Those tolerance vary greatly.

There are two forms we're measuring in our tanks, Ammonia (NH3) and ammonium (NH4). The tests we used don't differentiate between the two. Ammonia (NH3) is very toxic where Ammonium (NH4) is not.

These forms of ammonia(um) change depending on PH. As the PH decreases the form shifts to ammonium where at high PH it shifts to ammonia. So a reading of 0.5ppm at a PH of 6 is not really a problem whereas the same reading at a PH of 8 can be lethal.

Of course there are other things that influence the toxicity. However, PH is the biggest factor for us.

Also, in a sparsely planted tank, very small amounts of ammonia (undetectable) can cause algae blooms. So in short, simply make every effort to maintain a 0 ppm level.
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