Fluval Reef 4.0 Nano LED 25W with Bluetooth MeshThe German engineered Fluval Reef Nano 4. 0 LED doesnt just illuminate your saltwater aquarium, it transforms it. With its critical actinic range, this full spectrum lighting system gives your corals exactly what they need to photosynthesise, grow, and show off their most vibrant colours. The best part? You can control everything from your smartphone. The FluvalConnect app puts you in charge of independent colour channels, 24 hour lighting cycles, and