Water softness question

[cacichilds]

I'm considering a single or a small shoal of Piranha, not sure on the specifics. I've even been considering 2-3 payara scomberoides or a big group of exodons.

Can they handle my hard-water? Or are these fish preferably going to want a blackwater?

I Have plenty of driftwood but that just lowers my ph not hardiness =( I could add a bag of peat but then it's always tannin.


Thanks folks.

 

[jp80911]

what's the hardness?
piranhas are typical very hardy fish, if accumulated well they should adjust without much issue. stability of your water parameter is more important