The 2 waterfalls into the overflows and the one durso that wont settle down after I cleaned it. Every 15 seconds I get this giant sucking noise. :(

I voted sump waterfall as it will be until I change to a Herbie this weekend coming up.

After that, it'll be in this order:

1. Skimmer pump (Vertex IN-100)
2. Vortech (when near max gph)
3. Return pump

definitely my skimmer, the pump is making an odd noise but I'm kind of scared to take it apart with my track record on equipment "maintenance":surprise:

Just make sure you have a spare of every possible part on hand.... :lol:

i voted the diy skimmer.its the 1/4' air tube into the pump,too lazy to silence it.
but again its not a problem as i have an in-wall tank and back room is only for equipment.

My return pump, but that's in the basement and the tank is on the main floor. Upstairs the noisiest part is the wavebox.

My screams of frustration, second would be the three darts running the system. Each of them alone are pretty quiet but together they make a quite a loud hum.

Skimmer air intake, sounds like someone sucking the last bit of a milkshake with a straw. Except it never stops.

My noisiest was my Rio 32HF return pump that just died. My Mag 9.5 that I replaced it with is near silent. :biggrin: The noisiest part of my tank now is my skimmer, but it is pretty quiet.

LOL