It's quite common to see growths in developer rinses which are mildly alkaline and contain organics or in finishing rinses like CU-56 but I've not seen it in acid plating rinses. The best approach I've seen is to add a strong hypochlorite bleach to the tank once a month to kill the bacteria and then rinse thoroughly and refill. --------------------------------------------- While cruising the Internet, be sure to visit our home page at http://www.automata.com --------------------------------------------- On Tue, 13 Feb 1996, dhoppe wrote: > Has anyone had any exposure to fungal growths in thier plating line > rinse tanks (especially after the acid cleaner). This hyphae is quite > hearty and nothing seems to kill it. It is not an algae. I've even > tried glutaraldehyde, a common antifoulant used in the metal finishing > industry, to no avail. What does anybody say? > > Don Hoppe Jr. > ZYCON > [log in to unmask] > >