If azolla growth becomes a problem and control is deemed necessary, it is best achieved by mechanical or manual removal, such as scraping it off the top of the dam with a scoop net. Some chemical controls are available to help control azolla, please contact your local chemical reseller about these.Click to see full answer. Similarly one may ask, how do I get rid of Azolla? Chemical Application Best Practices Treat your pond in sections. Treat only half the pond’s surface at a time. Once the weeds have browned, use a rake to remove as much dead material as possible. This prevents an accumulation of dead plant material and muck. Take a proactive approach to pond management. Subsequently, question is, how does Azolla reproduce? Azolla reproduces sexually, and asexually by splitting. Like all ferns, sexual reproduction leads to spore formation, but Azolla sets itself apart from other members of its group by producing two kinds. During the summer months, numerous spherical structures called sporocarps form on the undersides of the branches. One may also ask, why does Azolla turn red? High temperature/intense sunlight — A brick red color of the Azolla indicates high light intensity. Too much heat will cause the Azolla to turn brown/reddish pink. The loss of the plant’s green pigment (chlorophyll ) will retard photosynthesis, consequently causing slow growth and multiplication.How do I control weeds in my pond?Make one yourself to stop weeds and keep anything that comes into contact with the pond natural and nontoxic. One method is to combine 1 teaspoon of liquid dish detergent with 1 tablespoon of gin, 1 tablespoon of apple cider vinegar and 1 quart of water, and spray the solution on weeds.