Hello, I have been reading alot about algaes on the net and all have been in reference to or follows the path of "I have bad algaes, what are they and how do I get rid of them" never have I seen any detailed reference to the 'good' forms of algae, by 'good' I mean helpfull algaes to shrimp, fish, plants and the ecosystem of freshwater areas. Any clue as to where I can find this information at? ed