Chemical for Tank

Aiptasia and majano anemones can be killed with kalkwasser while the tank is cycling. Thumbsplitters (mantis shrimp) aren't really a big deal. Heck, I nab them with bare hands. A decade ago, everyone wanted all bristleworms removed from their tanks because anytime something died, they would see bristleworms on it. In reality, bristleworms are great at cleaning up after something dies...they don't cause the death. More and more people are seeing that mantis are not responsible for all unexplained deaths.