Originally Posted by AquaJoe
Both species are known for being "tank busters". Just thought I would point that out
Even our little 12"-14" Oscar is considered a tank-buster, both the Bala and the Iridescent Sharks have the potential to get larger and heavier, in the case of the Iridescent... Much larger/heavier 8O !
Some folks fail to realize just how powerful fish are, and how much kinetic energy they can generate when dashing across the tank in a panic and smashing against the glass.
I don't want to do the math, but just imagine a 1.5-2lbs fish which a has a pretty good density for its mass, moving at 15-20+mph hitting your average .25" glass combined with the force already being exerted on the glass by water pressure...