While the first quote is true .....its also a heavy sugar coating. If it wasn't sweetened up to sound easy as cake then fuges is all anyone would ever need. The reason people have algae outbreaks with an incorporated fuge is one or more are out competing our chaeto or caulerpa. And several caulerpa strands as well as briopsis aren't palatable to most herbivores. So yes your tank will find a way to use up the nutrients that build up, but its not pretty.