OM 4-ways running very hot


New member
I have a new tank set up, with 2 sequence barracudas, each one running an OM-4 way for my closed loop. I didn't install these myself as I am not a tank builder did it.

The problem is that they are so hot that you can't even touch them for more than 1 second without burning your hand. We keep throttling back the barracudas, and they are down to about 50% through-put now, but it doesn't seem to make any difference to the temp of the OM's.

Any thoughts on this situation? I'm worried that the OM's may fry and break.


New member
My OM 4way is very hot to the touch but still working fine after 2 years plus (and was bought used).