Closed Loop Too Loud

[Jaws]

I currently have two 1” sea swirls running off a Mag 36 and it is way too loud. It’s a closed loop, there’s about six feet of vertical 1” pipe from the pipe up, then six feet of horizontal pipe with a sea swirl at one end of my six foot tank and the other sea swirl at the other end. Any recommendations on a quieter pump that will run these devices optimally?