Hello!
Now I just had time to measure all my peat water – water prepared for water change by osmosis and peat and my three blackwater tanks. One of them half a year old, one of them about three months old, one for about 9 months old.
Nowhere I could find ammonia. I measured with drop test and photometer of Halanek and Gabriel in Austria.
I use black peat granules from Fimö Aquaristik.