I wish but it is not that much every day it depends on the weather.At the moment i have to full my 200L drum up twice a week and always left with half to a quater in the bottom.300 to 350L a week.My tank is in the wall and goes out into the garage which has a skylight roof and it gets dam hot out there.For some reason it has always used more evap being out there.My light does not come on till 3pm and the sun starts coming in strong about 9am now.It could be the combo of the sun and the heat.It looks awsome with the natural sun light especially in the morning.