[quote=”Aleksandr” post=2874]
A friend of mine has a similar tank with an acidic substrate and has successfully bred good numbers of Paros sp ‘Sentang’ and chocolate gouramis in it without any intervention
Hi Tom,
What water parameters in this tank? What specific substrate does he use?[/quote]
From my friend –
“Kh was 0 and sonetimes 1, gh4 and ph tended to vary between 5.8 and 6. Temp was 26.
Substrate was the aqua pond soil with eheim peat pellets sprinkled on capped with tmc nutrasoil.”
The “aqua pond soil” is this one – http://www.ebay.co.uk/itm/Original-genuine-AQUA-SOIL-formulated-for-your-pond-plants-20-Litres-/151225919051?_trksid=p2054897.l4275
Basically just a topsoil without added nutrients I think, it has negligible effect on water parameters.