Major die off after 40% water change + flourish excel double dose

  • We are currently upgrading MFK. thanks! -neo
Does excel posibly kill off biological filtrations microorganisms? should have eased into the excel a little slower.

"Of course the plants don't die anymore, but I cannot count the number of times I mistook the amount of water to add, or put in to much CO2 and awoke the next morning to find all the fishes floating dead at the surface. But my intuition grew."
Takashi Amano, Nature Aquarium World book one
 
I am sharing Stan's thought. If those fish are stressed then a water change can wipe them out.
 
MonsterFishKeepers.com