Red Sea Max 250

[The Codfather]

+1 on noctua, I modded to the 25mm on my rsm250, they work way better.
I'll see if I can't snap a few pics to show.

[The Guy]

Originally Posted by The Guy

These are not the internal hood fans, they were removed when the Steve's Led upgrade went in and have squirrel cage style fans which are dead silent.
The ones that are noisy are the 2 little 60mmx60mmx 15mm side by side fans that are mounted on the left back side of the tank just below the canopy in a snap in bracket and are plugged in for power with a 12 DC RCA jack.
They are very noisy, they're the ones I want replace with better quality quiet fans. Still looking.

So I ordered 2 new very quiet fans from the "Cooler Guys" got them yesterday
$6.50 each, put them in the RSM mounting bracket and WTF! louder than before. I've had this problem when I was in the HVAC trade with grills and fans causing fan noise, the problem is the Red Sea bracket not the fans I cut out all the grills front and back of the bracket put the original Red Sea fans in snapped it in fired them up and totally silent and a lot more air flow as well. The grills were causing the noise by upping the static air pressure across the fans as the air passed through them and reducing there performance. I suppose the grills are there so junior doesn't put fingers in them, but being at the back of the tank and high up I don't see it being an issue.