What is a shared husbandry concern for both piranhas and silver dollars due to their membership in Serrasalmidae?

Answer

Sensitivity to poor water conditions requiring robust filtration

Both groups are sensitive to poor water quality, and because they are high-metabolism fish producing a significant bioload, robust filtration is essential.

What is a shared husbandry concern for both piranhas and silver dollars due to their membership in Serrasalmidae?
taxonomyfamilyfishPiranhasilver dollar