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Old 01-14-2009, 01:15 AM   #6 (permalink)
Homer_Simpson
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Somebody correct me if I am wrong, but I believe a 9 litre bag should be enough for a 20 gallon tank, so 1/2 of that 4.5 litres should be good for a 10 gallon tank. If my math is right, 3 litres should be enough for a 5 gallon with some left over.
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