Today, before a water change;
Ammonia at <0.25mg/l
GH 60mg/l
KH 40mg/l
pH 7.0
NO2 Nitrite 0.25mg/l
NO3 Nitrate 10.0mg/l
Temperature 26°C
So...a slight decrease in the ammonia.
Plants are doing fine, meaning no 'melt'. Snails appear okay, with that 'toilet', down at the front of the tank seemingly popular.
Paying close attention to movement, I spotted a bloodworm a-wriggling and a small rotifer-type creature, swimming around.
The creatures will have come from the wood, which had been soaking in a large water butt outside. Although the pieces were rinsed thoroughly in clean water, before insertion into the tank, there weren't bleached.
Bleaching may clean everything in the wood, but I know that said bleach is very difficult to remove for the porous wood afterwards.
(I was once advised to leave the bleached wood soaking, outside, to dilute and finally remove the bleach! Guess what happened, once the bleach had gone and was safe enough for the tank once more?)