Hey everyone hopeeveryone and their tanks are doing great. Anyway so I made this overflow for the sump for my 90 gallon. The idea is based on the link below I worked so hard and it seemed to work so well! I used 2" outside and 1.5" inside. However I raised the whole thing up to see if it would re-syphon, but it did not Although the water was at the whole surface of the inlet and not.even a cm below it ,it would just not work again. I submerged the whole thing in water again and it seemed to work again but after a little while it lost the Syphon again :/ even this time the water had not gone below the surface of the inlet. What could be wrong? :/ I think there could possibly be 3 things wrong : 1) the inlet and the outlet level kind of overlap almost 0.5 inches 2) instead of the 90° for the inner 1.5" 'syphon' tubes, I used these long 90° pipe like things which are almost 3" on either side of the curve 3) the 1.5" inner Syphon tubes do not exactly reach the lower end of the 2" pipe on either side of the overflow 'box' Could it be any of these ?? Sorry for making it so long. But I'm really desperate for help. Please help. Thanks!