i am setting up a 10 sump and fuge on my 10 gallon tank. they have to sit side by side. i was just wondering if i get a hole drilled in my main tank about 2 inchs from the top and i drill my sump 2 inchs from the bottom, would this cause a syphon effect to drain into the sump. i think this is the only way i can do it with out having to buy an extra pump. any advice or designs that any one has would be great help. thanks