Coralife Calcium Reactor with the Easy-Twist CA+ Reactor Chamber Cover (3” dia.) with pH Probe/Sensor for a pH controller or monitor and a Inlet Fitting Integrated Clear CO2 Bubble Counter and CO2 Check Valve Reactor Intake Media Strainer 3’ Water Supply Input Tubing with Strainer Water Supply Control Valve Removable Self-Priming External Pump Clear Water- Flow Indicator Chamber 3’ CA+ Reactor Output Tubing Compact High-Grade Acrylic Construction.