LTWHOME Fish Pond Foam Filter Sponge Set 17 Inch X 11 Inch Media (Pack of 3 Sets) There is no poly side

There is no poly side to these filters

Blue foam side captures large particles

Non-branded Foam but suitable for Aqua Clear 30 / 150

The filter floss can trap small particles and debris keeping your aquarium clean and clear

This filter pads is custom designed and manufactured for Rena Filstar xP Filter Media 724A 30PPI/723A 20PPI

LTWHOME Fish Pond Foam Filter Sponge Set 17 Inch X 11 Inch Media (Pack of 3 Sets) There is no poly sideIncluding 3 sets, each set have 3 foams ( 1 x fine, 1 x Medium, 1 x Course) Reticulated Foam Sheets Fits A Wide Range Of Filters Simply Cut Holes In The Desired Position With Scissors New Filter Sponge Will Help Improve Filtration 17 inch x 11 inch Pond Filter Foams