Edwal 4 Oz. Hypo Check (Liquid)

Edwal's Hypo Check is a simple tool to check for exhuasted fix. After overuse hypo gets oversaturated with silver solution. It only takes one to two drops of the solution to check the hypo. Should a white precipitate occur the fix should be discarded as it is exhausted. The Hypo Check does not harm the hypo if it is not exhausted.