CoCo Husk or Aspen. I've never had that issue with the chip between the scale and like kite said, it's a 4000 gram snake.
CoCo Husk holds humidity pretty decently and I wouldn't keep a snake on Eco Earth, but that's just me. Cypress Mulch or Forest Floor is good as well though I recall somebody saying Cypress Mulch is facing some environmental issues with the demand for all the mulch and what not, so I'd be concerned at how long until they take actions against it.