Hach Modified Colitag Sterile 120 mL Sample Bottles with sodium thiosulfate tablet. Can be used with all Hach Modified Colitag 16-hour presence/absence tests. 100/pk. Hach Modified Colitag offers the following benefits:

• The Fastest Presence/Absence Test on the Market at 16 Hours
• One Product that Supports 16- or 22-hour Test Methods
• Results are Valid for 48 Hours
  
  (Please Note: When transported in hot weather, the tab may melt. This does not affect product quality or function).

Fastest EPA-approved test for coliforms and E. coli. Test as late as 5:00 PM and still have your results by 9:00 AM the next day.

Allows for a "standard" test that requires less set-up, or a
"rapid" test when necessary. One media for both tests reduces
complexity in certification and inventory.

Saturday’s tests can be read on Monday—no need to work all
weekend. Results stay valid for 800% longer than the competition.