Modular Surface Skimmers. They attach via water suction in front of the intake grill of the Nano-Cube and instantly transforms it into an overflow box within seconds.
Other Items from JBJ Accessories NANO/MINI INSTALLATION KIT - MODULAR SURFACE SKIMMER (Fits 12g & 24g Models) - MODULAR SURFACE SKIMMER (Fits 6g Model) - JBJ Digi-Temp Thermometer - GRAVEL VACUUM CLEANER + AUTO SIPHON PUMP -