Hello everyone and welcome malikmoloch,
Helene is very right here, more informamation on water quality could help. My experience with people starting blackwater acidic tanks is that many are scared of low
TDS and so low pH. So they set up the parameters to what they think are low but still reasonable levels. Sadly, such conditions are the most unstable one could imagine and you end up many possible sudden changes. You name it: Different forms of nitrogen going back and forth quickly, high bacterial load, unstable pH itself. So yes, in stable tank paros could live in pH around
6, but if you are setting up a new tank and you are not experienced balckwater aquarist, aim for pH bellow
6 and very low
TDS (
15−
30) with plenty of humic acids and leaf or alder cone extract that will stain it like a tea. Alder cones are great stuff to lower pH quickly and keep it stable + they release great antibacterial substances and you will see how paros love such water. Make sure you have zero alkalinity (“carbonate hardness” as they wrongly call it) and start with very soft water. The thing is that the “reasonable compromise” here is the worst way to go imo. I hope that helps and cheer up for next and better try