No thanks, I still have to test the fabrics you already sent.
Hmm, a 1020 tray is around 1.7 square feet. One fifth of a square yard. I'm hoping for something really cheap, but the sham-Wow might be like a commercial capillary mat: a sure-thing fall-back if I can't find other solutinos.
The idea that used clothing and sheets are cheaper than new fabric sounded promising.
I wonder about used towels (terrycloth)? But they're probably cotton, which i already know will rot.
Hey! Maybe bottom-watering with 0.1% hydrogen peroxide would prevent the cap mat from rotting!