I just filled up my 60 gallon fuge....Im going to let it cycle through before I set it free to the tank.....My question is where should I put the lines in???I was thinkin coming from the top of the tank going into the fuge and from the fuge to the sump???? or from the sump to the fuge back to the sump????what is everyone doing on their fuges????also what is a goo sand bed depth???also how many gph should I put though the water 500:?