vortech

[mike31154]

I started with one MP40W in my 77 gal and added a second one about a year later. Two are great in there, you should not have an issue with one whatsoever. Each one of mine sounds a bit different. I'd say the newer one is a little quieter. I find neither of them obtrusive with regard to sound, it's there, but generally fades into other ambient noise in the room.