Physan 20 is a disinfectant, sanitizer, deodorizer, fungicide, algaecide and virucide. We use this product on our orchid plants to clean the algae that can build up inside the rocks and on the media. The recommended dose for Adult Orchid Plants from the manufacturer is 2 teaspoons Physan 20 per gallon of water. NOTE: This product should not be used with water that contains nutrients or fertilizer as it can negate the effect.
For more information on this product, please visit www.physan.com