Add more functionality to your Smart Pond Dosing System XT with this Add-On Kit. It lets you apply two different water treatments at the same time to your pond, waterfall, or fountain. This kit makes it simple to add a second 64 oz. treatment, improving your water care routine. Maintain for Ponds is the standard treatment for ponds, while Prevent for Fountains is made for fountains and waterfalls. Using these base treatments with specialized products can lead to great results. For example, using Maintain for Ponds with Clear for Ponds can significantly improve water clarity. Each controller connects to the Aquascape Smart Control App, allowing for easy dosage changes and low treatment alerts on your phone or tablet. The kit includes one control panel, one treatment intake assembly with a low treatment alert, and all necessary tubing and cables.