Put two AquaClear 110s on the 75 and be done with it. As long as you keep your water level high in the tank, they are relatively quiet. I have been running the AquaClears for over 30 years with no problems. Best aquarium filter ever made.
It's called quality.Thanks for all replies!
I'm still curious why a Fluval rated @ 300 gph, would cost more then an Aquatop @ 500 gph?
It's called quality.