KH & PH levels

Question
hi, i have a 120 litre freshwater tropical tank,what would be the ideal PH & KH LEVEL?

Answer
Hi Marina:  The pH is usually best between 6.5 and 7.5 depending on what kind of fish you are going to be keeping.  KH, GH, and pH are very dangerous chemical levels to mess with in terms of trying to adjust them.  Fish are very hardy and usually live just fine in varied conditions. The danger comes when one of those values changes suddenly or so fast that the fish can not adjust to it.  So before I answer your question I will need to know what kind of fish you want to keep, and what your current pH and KH levels are.  Dave