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Cycling Established Tank Question

kashifg

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Ok, bear with me whilst i give the background.

I had an established Malawi Trigon350 running for years, due to some sort of disease outbreak, all but a few got wiped out recently. Now i keptthe tank/equipment running, but obviously with not much bacteria being processed through the filters. The last few fish went back to the lfs.

So i took out all existing gravel/rock, and rescaped as a planted community setup. I have been cycling for a couple of weeks now, the Ammonia is at 0, Nitrite has been at 0.25, with nitrate at very high levels - 75mg. I did a water change to bring this down, but it went back up after a week. I have been dosing ammonia on a daily basis to 3ppm.

After redosing with ammonia when i check after 12 hours, this shows as 0ppm. The Nitrite is however not moving from 0.25- its never been higher than this. The nitrates are sky high, which is leaving me puzzled where i am in the cycle? i tested my tapwater for levels just to ensure the tests were not reporting faulse results, and these came back as 0 for Ammonia & Nitrite.
I introduced some plants half way through, but not sure whether this would have had an impact on the result i'm getting with the Nitrite?
Any suggestions/ideas most welcome
Ta.
 
Plants will absorb the Ammonia, thus giving false readings..
Take them out, dose again, see where you are at.
I also suggest a PH test, it may have stalled due to the high Nirate levels, it needs to be up around 8.0
 
It is normal for the nitrate to come back within a week, thats why you're meant to do a weekly water change, but if there is no fish (or 1 or 2 malawis not sure what u were saying) they shouldn't come back so fast
 
Is it really necessary to take out the plants?
This would be quite a job considering how much its planted.
 

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