"john west" wrote in message
om...
hi, i have not had an aquarium for long, but i have a blue green
scummy seaweed growing on the top of my proper seaweed. also some blue
green weed is growing on the water pump as well. how can i stop this
growing please.

my tank is not near a window, i mention that because someone said the
tank should not get too much daylight. thanking you john west

Different algae types require different combat methods.
http://faq.thekrib.com/algae.html