Hi, my name is Dale and Im an addict. Ive been in the hobby off and on for about 15 years. My wife and I just upgraded to a used S500 and am really impressed so far. However we are having an issue with the water level in the display tank. I cant seem to be able to get the water line high enough to be hidden by the white trim. If I adjust the valve on the back to just below the top of the emergency overflow, it seems to remain quiet, but if I adjust it a little higher, then it starts to make the loud draining noise. When I bought the tank, it had a generic return pump which didnt always restart after a feed cycle. I had an extra Jaebo DC 9000 laying around so I hooked it up. I have not put the old pump back in place yet to see if that helps, do you think it will help? Im pretty sure the DC9000 has somewhere around 2300gph, that should be plenty.....right? Anyway, looking forward to learning from all of you. Thanks in advance.