just started my new system. are they really suppose to be loud. just took it apart to clean it and put it back together and its still loud. im running a 100 gallon display with a 30 gallon sump, 20 gallon fuge, and a 29 gallon skimmer tank. drains are dual 1.5" pipes with dursos in the overflow. mag 24 returns the water through a 1.5" pipe with a 2 inch check valve. im thinking about down sizing to 1" return. what do you think????????


