Collection: Controllers & Monitors

What a Controller Actually Buys You

Testing by hand tells you what your water was doing when you happened to test. A controller tells you what it is doing right now, and acts on it. Continuous temperature, pH, ORP and salinity logging, programmable outlets, and alerts when something drifts out of range — that's the difference between catching a heater failure early and finding out the hard way.

Pick the Right Level

• Single-parameter monitors — a straightforward dedicated pH or ORP display.
• Full controllers — modular, expandable systems with switched outlet bars, flow and leak detection, and remote app access.
• Automatic testers — hands-off testing for calcium, alkalinity, magnesium, nitrate and phosphate; reagents sold separately.
• All-in-one monitors — water quality plus lighting measurement in a single device.

Plan for consumables. Reagents, calibration solutions and replacement probes wear out on a schedule, and a tester without reagents is just an expensive box. Questions on building a system? Email info@jlaquatics.com.