[i have crabs]

i have 2 on my other tank and never noticed a sound cause everything else covers it up and the motors are tucked behind the tank, on the cube it wasnt really tucked away in a corner or anything and the sound was driving me nuts, we arnt talking a huge noise but when its the only noise it was quite obvious, i was getting a real nice wave which is what i wanted but the splashing water in the overflow and the pump speeding up and stoping was a killer.
im not overly upset with having an extra vortec for the 300g though.
im really liking the flow coming from the tunze though too bad they dont have some cheeper controllable sizes, the ability to aim the power head is nice too