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Judgegeo Judgegeo
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  • Posted on: 24/12/2012 0:36
Re: Not a clue! #11
Ammo 0
Nitrite 2


Didnt worry about nitrates as that doesn't seem to be a concern at the moment?

Cant believe its still so high!!
Fishlady Fishlady
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  • Posted on: 24/12/2012 1:10
Re: Not a clue! #12
Big water changes daily or more to keep that below .5 then, and double-dose with Prime daily too.

At least you know what the problem is now. Such a shame
Judgegeo Judgegeo
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  • Posted on: 24/12/2012 11:10
Re: Not a clue! #13
Strange. Woke up this morning with nitrites between 0.25 and 0.5ppm... I can only assume that when i tested the water last night, it hadn't had time to dilute (it was 2-3 hours after though?).

Or could it be that something was on the 2 stones and resin wood we removed?

I know what the problem is... just not what caused it :S.
Fishlady Fishlady
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  • Posted on: 24/12/2012 11:41
Re: Not a clue! #14
Nitrospira (the nitrite-eating bacteria) can go into a dormant stage when conditions are unfavourable. That's why it's possible to bottle those, but not the ammonia eating bacteria. It's quite likely that some died and some "went to sleep" and have now woken up to start work again. Dilution of nitrite would be virtually instantaneous so is not an explanation in itself, though it will be a partial factor.

The stones and resin could not transfer nitrite. If they were from another tank and had organic residue that could cause ammonia and then nitrite, but you had no ammonia spike.

EDIT: Just re-read and find I had the names of the bacteria switched - nitrospira are the nitrite eaters, nitrosomonas are the ammonia munchers.
Judgegeo Judgegeo
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  • Posted on: 24/12/2012 12:09
Re: Not a clue! #15
Wow... that I did not know!

I will carry out another 30l waterchange just to be safe, and test again later to see what the levels are like.

I was close to taking all the fish to MA because I feared I would have to cycle the filter again! :(