Thermal bath media, whichcan be used to replace conventional wetmedia or dry solid blocks used in existingthermal baths for heating or coolingsamples that impart advantageous maintenanceand microbial control benefits.Thermally-conductive pellets have substantiallyelliptical shape, rounded edges, hardenedsurface, and a smooth polished finish. Thesmall size of the thermally-conductivepellets allow for efficient thermal communicationbetween pellets and samples. Thethermally-conductive pellets may comprise asolid or hollow construction of a sufficientlythermally-conductive material with orwithout an antimicrobial barrier incorporatedinto or onto the pellets.