API Test Tube (each)

A+++ product

Replaced the one I dropped. Nice that you can buy the amount required and not be forced into buying a pack.

Brilliant sense i keep smashing the god damn things...

Perfect replacement after I accidentally broke one!

I tend to use these on "conditioned new water" as a control to compare against tank water. (The API test kits themselves usually only contain one tube ). A useful spare part.