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-   -   ammonia/ ammonium??? cycling problem (http://www.tropicalfishkeeping.com/beginner-freshwater-aquarium/ammonia-ammonium-cycling-problem-22557/)

turkeyofthesea 03-28-2009 09:35 PM

ammonia/ ammonium??? cycling problem
 
Hi all!
I am 5 weeks into a fishless cycle that seems to be going nowhere, and now i'm questioning if my ammonia readings are actually ammonium (since the API liquid kits test for TAN). Hope someone may have some advice about a next step to take!

Levels for the last 5 weeks:
ph 6-6.2
ammonia 4
nitrite 0-.25
nitrate 0
temp 78

Here is what i have:
10 g new, HOB with sponge filter new
ada aquasoil substrate (which leeches ammonia)
treated tap water also treated with stress zyme (original tap has ph of 7.6 with no ammonia, nitrite, or nitrate)
heavily planted with anacharis, swords, and java fern (already making babies!)
bogwod, two rocks
and in last two weeks planaria and malaysian trumpet snails have appeared (from plants i'm guessing)

because my ph is lower could my ammonia levels actually be ammonium?? or is my cycle just stalled because of low ph? if so what do i do? please help!

thank you!:cry:

Byron 03-29-2009 11:33 AM

I'm assuming that if your tap water is pH 7.5 you are using CO2 which is lowering the pH to 6.2. Or are you doing something else to get the pH that low? The pH is my view is not causing the ammonia to rise, but I'd like to know the answer in case there is something else here.

What are you using to cycle instead of fish?

The above answers will help us.

Pasfur 03-29-2009 12:43 PM

It is rather well documented that nitrifying bacteria are not effective at converting ammonia to nitrite at a pH of below 6.4. Why are you maintaining a pH at such a low level?

Byron 03-29-2009 01:47 PM

Quote:

Originally Posted by Pasfur (Post 183550)
It is rather well documented that nitrifying bacteria are not effective at converting ammonia to nitrite at a pH of below 6.4. Why are you maintaining a pH at such a low level?

I don't mean for this to be confrontational, but for more than 5 years I maintained a 115g, 90g and 70g tank at a pH of 6.0 and 6.2 and honestly I never had ammonia or nitrite above 0 (after cycling in at the start). The tap water then was 5.8 (often far lower) and I had a small nylon bag with about 6 tablespoons of dolomite in the filter chambers of each tank, and that (I assume) kept the pH at 6.0 or 6.2 and never a problem with the fish; as now, they were all south american characins and corys. In 2001 the water board raised the pH to 6.8 and now my two tanks are at 6.5 and steady.

I may have some suggestions when turkeyofthesea provides the info requested earlier.

Mikaila31 03-29-2009 04:48 PM

IMO I believe it is possible to cycle a tank with a low pH, but it takes far longer than with a more neutral pH. I would try to increase you pH and see if it helps.

Weather it is ammonia or ammonium does not really matter, though there concentration do have to do with pH, the biological filter will use either one. Ammonium is one of the ways Prime works, it is less toxic than ammonia, but can still be used by the filter.

MBilyeu 03-30-2009 12:33 AM

Depending on the size and type of the bogwood that may have some pH lowering characteristics... Just my .02


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