The Trident is an automated testing system that regularly tests alkalinity, calcium, and magnesium in your saltwater aquarium — and then communicates this information to your Apex so you can get alerts, and change your dosing. When combined with...

Flow: 3,100 gph (11,500 lph) Wireless: Included Max Head Pressure: 21.5 feet (6.5m) Footprint: 5 in. x 8.5 in. (126.8mm x 215.15mm)   Fittings: Input: 1.5 in. (38 mm) Output: 1.25 in (31.75mm)   Standard PVC...