Hello and thank you for your replies.
I have received location for the fish now from the importer.
Sumatra, Pekanbaru, Riau province, near the river floating through Laggam area, named by the fisherman who caught them as “Laggam River”. I guess, since Langgam is very close, it is Langgam that is implied, not Laggam.
As for exact species, you are right, it is not important as long as they are healthy and want to breed.
The tank has a lot of bog wood in it and some floating java sprite and a few Bucephalandra attached to bog wood. I have nothing on the bottom of the tank to make it easier to clean but i might add some oak leaves. Fall is here and the leaves will start to fall in huge numbers any second.
As for tank parameters, i do not measure. it is 100% RODI water with 0 TDS according to electronic TDS meter. This with bog wood and Alder cones must create a low pH & close to 0 conductivity, of that i am fairly sure. i vacuum the bottom and change 15% twice weekly.
The snail is removed! But she has laid eggs on a leaf … we shall see if they survive.
Vbr
Daniel