These are great to have when replacing my filter every 3 months. They look just like the name brand ones and fit into my slot as expected.

Instructions with the sticks describe exactly how to sanitize a spa with no chlorine nor bromine. This after the initial super-chlorination of a new fill with a tablespoon of dichlor.

This product does nothing for my water quality or chlorine stability. Contains bacteria that is not safe. It says bromine free spa but no mention at all for bromine.