When used in conjunction with the Smart Pond Dosing System XT, the Smart Pond Dosing System Controller Add-On Kit allows you to add two water treatments simultaneously to your pond, waterfall, or fountain. This controller add-on kit makes it easy to apply a second 64 oz. treatment to further optimize your water treatment regimen. Maintain for Ponds is the staple treatment for ponds and Prevent for Fountains is the primary treatment for fountains and waterfalls. However, it can be extremely beneficial to combine these staple treatments with one of our problem-solving treatments. For example, add Maintain for Ponds along with Clear for Ponds for water clarity like you’ve never seen before. Each controller can be paired to the Aquascape Smart Control App for quick and easy dosage settings and low treatment notifications on your smartphone or tablet. Each kit includes one control panel, one treatment intake assembly with low treatment alert, and all tubing/cables.