Fuzz Algae grow on leaves and plant stems not necessarily exposed to strong lights. The effected plants are probably suffering deficiency problems and are leaking nutrients back into the water. This algae is considered normal in small extend. Aquariums with fish such as Siamese Algae Eater, Otos, Amano shrimps, Bristlenose pleco or Molly will not suffer from this algae. Balanced plant nutrients will give a head start against the algae.Photos from www.mikes-machine.mine.nu/
