Quote:
Originally Posted by AquaticFinatic
This is most probably a newbie question etc but I'm all outta ideas! I have a green film algae that keeps coming back time after time. I can clean my glass and within about an hour or two it's back again if I leave it for a few hours I can't even see in my tank. I'm cleaning twice a day here. Any advice please fire away. Thanks in advance 
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lights or phosphates
when my gfo needs replacing my glass gets alot of film algae.
snails,blenny urchins etc all eat it:P