A: From its discovery in the late 18th century, the history of hydrogen peroxide is over 200 years. Hydrogen peroxide is a highly reactive, strong oxidizing. It can be involved in most of the redox reactions of harmful substances with almost no toxicity and is more biodegradable. Solid hydrogen peroxide has been widely recognized in aquaculture due to its ability to reduce the subaqueous content of ammonium and nitrogen, transfer electrons to dissolved oxygen to form superoxide radicals and increase oxygen levels, prevent anaerobe from proliferation and kill nosogenetic bacteria, and enhance water quality. It is also considered as a treatment against ectoparasites of adult fish, improving fish health in aquaculture to support the sustainability of the aquaculture industry.