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Originally Posted by fatpuffer
It is not impossible to have zero amm and nitri...maybe nitrate but not those two parameters. I have a marine tank with no detectable amm or nitrite...when Nitrate goes up, i do a water change.
Sounds like it is cycling. Maybe a mini-cycle. Check if there are leftovers around the rocks.
Js
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Nitrification happens all the time, not just during cycling. Consequently, there will always be ammonia and nitrite in the water. Just at reduced levels, is all. Therefore, a reading of zero does not mean that there is zero ammonia and nitrites in the water. It just means that, like you say, it is "non-detectable". But it's still there.
At any rate... readings of 0.04 for ammonia, and 0.01 for nitrites are waaaaaay within acceptable levels.
The calcium does appear high, though.
Cheers,