Originally Posted by maxalmon
Use the foam block for an Aquaclear 110 filter. It's about 3.5"sq and maybe 11" long. If you use a bread knife you can slice it down the middle, making a cut about 1" deep lenth wise. You can then just push this foam block down ontop of the wall before your pump. Or you can just set the foam block down on top of the pump
A= On top of the wall, this works most of the time, depends on water level, if water level is low it can cause bubbles to drip down
B= This is another option, just cut the block in half and carve out a hole for the tubing
The foam block should work well. I used a similar setup for a while and never had any bubble problems.