i recently bought the aquahub auto top off deluxe and i was just wondering if anybody has seen one of these units. i have marked by sump with the exact perfect water level. when i decide to mold the mold-a-holder, how far down to i mold it to maintain the water level that i want. the float switch is inside a snail and slosh guard so i am not sure what the level of the snail guard needs to be to maintain the water level that i want. anybody have any suggestions? i don't want to have to mold it more than once.