The use of a metal coat hanger can help if you need to lower the water in a fish tank and the noise from the filter is getting to you.
The part that was made for the filter was done by my brother. After seeing, that I made my version for the heater.Things needed
Metal coat hangers
spare aquarium filter
Pliers to bend and cut the metal
The other filter helps clean more of the water. It does not get as dirty. when it does get dirty I just hit it with the hand held shower head.