Be confident in your purchase we're an Authorized Simplicity Dealer. How cool is that?!?!? One of the most critical aspects of a successful dosing regime is making sure you don?t run out of dosing solutions. Of course, you can always visually monitor your dosing on a regular schedule. However, you can automate the process by adding a float switch to trigger a message or alarm when your dosing solutions run low. The Simplicity Float Switch Kit for Aquarium Dosing Container includes three float switches to help monitor your solutions and keep your dosing on schedule.