DETEX BLOX is now reformulated as DETEX with Lumitrack Biomarker. It is available for the monitoring of rodent activity in sensitive areas. DETEX Blox are completely non-toxic and contain no active ingredient. PCOs can expect the same superior bait acceptance that Bell's Blox baits are know for in the pest control industry. DETEX Blox have been tested and proven highly effective in Europe for more than a year. hole through the center allows DETEX Blox to be secured on vertical and horizontal securing rods inside PROTECTA Bait Stations.