Algae on greenhouse walls
An alternative to bleach spray is a weekly or biweekly spray with Physan or
other quartinary ammonium detergent. It doesn't remove algae but prevents
regrowth after cleaning. I use a capful of Physan per gallon of water and
spray until liquid runs down the greenhouse walls.Physan is odorless, doesn't
bleach clothing and has never harmed either plants or flowers.
David
|