uh-huh----------------
i just started a 4 feet tank (120cm 60 cm 60cm)
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you just answered your own question
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i am using 6 normal 36 watts 4 feet light tubes. i on them for 10 hours daily.
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10 hrs a day for a new tank is too much
try cutting down to 6 first
when the green water goes away increase by 1 hr per wk
to make it go away faster you can use interpet filter aid and filter floss in the filter
but remember you still need to cut down lighting, and also clean the filter to remove the clogged up 'green water'
hth
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