you should add like one big driftwood. it would make your fish more secure and would look nice with the sand.
Diogenes;3899868; said:just give them something to hide in/behing. Piranhas are skittish. They usually need a hide when they're young. Some people may disagree. RBP's as a whole are incredibly hardy though, I don't know if stress alone would kill them.
The only piranha I've ever heard of stressing to death is S. manueli.
Maybe pick up several clay flowerpots of various sizes from HD until you can afford to scape the tank?
studd muffin;3899896; said:you should add like one big driftwood. it would make your fish more secure and would look nice with the sand.