Formalin in the Hatchery
FORMALIN is used extensively in hatcheries to control external parasites of fish. There are reports that formalin is toxic at some hatcheries, especially when used on rainbow trout ( Salmo gairdneri ). This is a discussion of the development of the use of formalin to control fish parasite-in the hatchery, its properties, and some experimental work.
Progressive Fish-Culturist↗