algae in nature is usually a ...

algae in nature is usually a mix. you need to take it to a lab to be identified. but if you see things that are clumping...that blocks sunlight from penetrating to the bottom, you generally have to get rid of it. as for the weeds, if its not a foreign species, you are set. they grow mainly because of the availability of nutrients. same as algae and cyano bacteria. and how are you going to remove them? it may do more harm that good. traditional, they would use copper for algal ...but that actually does more long term harm than good. same with the weeds. roundup kills the weeds then it gets into the food chain. best is with bioremediation. a biocleaner system would very quickly get rid of cyano bacteria and produce chlorella. it will suck up nutrients faster than weeds. best way to get rid of nutrients is via fishing. if your bioremediation is successful, the nutrients will be converted by sunlight into chlorella and diatoms. these can be eaten by the fish. and if the water is free of heavy metals, the fish should be eaten by man. or pets. the fish would grow very fast. we have a unit being used in Roarke, India. and in 10 weeks, the fries have grown to fish that is over 250 grams.