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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 |
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