One small issue to consider in the future.
Balzani come from southern Brazil where temps are cooler than than the northern S American areas near the equator.
Whereas heckelli are fine with water temps into the 80s.
Those constant temps can be stressful for balzani, and create conditions where disease or fungus can be problematic.
My balzani group came from Uruguay, so I never used heaters at all in their tanks, allowing room temps to fluctuate slightly, and seasonally .