Just replaced a 55g with a 90g AGA with mega flow system, running a mag 9.5 in a 25g sump. No matter how I adjust the heigth of the drain tube in the overflow box, the water is rushing out so fast its splashing all over the place and the level of h2o in the overflow box is rising and falling way more/faster than my 125 with corner overflows. How do I tell if my pump is too much or its draining too fast and what do I do about it?