FlicFilm Hypo-Check Fixer Indicator

Hypo-Check from Flic Film is your reliable indicator for fixer replacement. Simply add one or two drops of this solution to your fixer bath, and if it produces a cloudy precipitate, it's a sign that the fixer is exhausted and needs replacement. Each 1 oz bottle of Hypo-Check contains enough solution for approximately 400 tests, ensuring you can keep your darkroom chemistry in top condition.