No offense, taken Pugwinkle. Don't worry...
For Penguins, I start with a piece of AC 300 foam. I cut it so it fits snugly, lying horizontally, in the media bay right up against the spillover, so that water dumps into the media bay behind the sponge and then has to pass thru the sponge to get out of the filter. I try to make the foam about 1/2" longer than the bay so it's wedged in there good.
For Emps, I use AC 500 foam in the same manner.
HTH,
Jim
For Penguins, I start with a piece of AC 300 foam. I cut it so it fits snugly, lying horizontally, in the media bay right up against the spillover, so that water dumps into the media bay behind the sponge and then has to pass thru the sponge to get out of the filter. I try to make the foam about 1/2" longer than the bay so it's wedged in there good.
For Emps, I use AC 500 foam in the same manner.
HTH,
Jim