Like the title says i was wondering if i could get some advice...i had a mag 9 but it's HORRIBLE for a closed loop. soo loud! I was wondering if anyone had any thoughts on what would be an affordable pump for the job. I was looking at the quiet one 3000 but i heard they add heat to the water bigtime. I'm looking for something affordable and quiet...again it's only a 40B. thanks for any help