Reef Octopus USB Smart Fan Size:4 Inch You don't need another module

You don't need another module or controller to add a float switch to your system

alerting you before a problem occurs

Output Size: 62mm/ 2in PVC

High-Performance Protein skimmer

Reef Octopus USB Smart Fan Size:4 Inch You don't need another moduleExcellent for light canopies, enclosed stands & cabinets to control heat and improve air circulation. REEF OCTOPUS USB SMART FAN The Reef Octopus USB Smart Fan will automatically increase or decrease the fan speed depending on the ambient temperature of the area surrounding the thermostat. Makes and excellent choice for aquarium canopies, enclosed stands & equipment cabinets to help regulate the temperature within. Keeping these areas cool will help