Nitirite Problem

Fordaz

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Newcastle, England
A friend of mine has just introduced his first fish into a newly setup aquarium. He's had them in there for about 5 days now, but the Nitrite levels have spiked bigtime.

It's a deep purple on the indicator... looks about the 0.3 mark, possibly higher... which I know can be lethal to fish.

However, there is 0 ammonia, the test comes out clear... so I'm stupmed as to what's causing it. Shouldn't there be a high ammonia content if there's a high Nitrite content?

Anyway, I've suggested that he do a 30% water change and replace his filter (mechanical filter, has no biological effect... the biofilter is in the ceramic media at the bottom), in case there's something rotting in there.

I added some of my Cycle additive to his tank 3 days ago (double dosage), but it doesn't seem to have helped... if anything, the Nitrite level has risen.

Anyone have any suggestions on how to get the Nitrite level down quickly?
 
My tank is doing this now too. 0 Ammonia and slightly high Nitrite. This means that bacteria is forming and is taking care of the ammonia,which is why it's at 0. Another type of bacteria will eventually grow and will take care of the Nitrite as well. I would do a 25% water change to see if it brings down the Nitrite a bit. Then keep checking it and continue with the regular water changes as needed. Nothing to panic about since this is a normal stage of cycling for a new tank.
 
:grr: if this is a new tank and has not cycled yet yr amonia will spike first then yr amonia will drop then yr nitrite and nitrate will peek then yr nitrite will dop as well but you should have nitrate to atleast 10 8)
 
Mine is doing this as well. This is after doing a 8 week fishless cycle. My ammonia is at .25 and my nitries are at .5 now and rising every other day it seams. My real concern is for my 3 corys and my dwarf gourami. I don't want my nitrites to spike again.
 
it's perfectly normal the bacteria that are keeping your ammonia at zero are expelling nitrites its part of the process.
 

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