Probably chelated copper, copper sulfate, or maybe even just plain old copper for the ones containing copper; copper culfate can be toxic to fish
.
Bromine is definitely toxic to fish, frogs, etc.
; it's often used in pools.
Both chemicals are usually used to kill algae and control swimmer's itch; both probably will result in a fish kill of some scale

, depending on the dosage.
Bromine is definitely toxic to fish, frogs, etc.
Both chemicals are usually used to kill algae and control swimmer's itch; both probably will result in a fish kill of some scale















