Nanochromis Transvestitus

[nanochrimislover2009]

if any1 has managed to breed these wonderfull fish coul you please help ive been trying for months,i need tank requirements and advice on how to lower my ph to 5.0 without using chemicals (ph down)

 

[england]

are these fish not from africa the congo region Zaire?
lowering ph i heard using oak leave's is good to accheive this,