... Fans,perfect heat sink.5.Widely used for Sea water aquarium, reef, frest water compatible6. Different ratio optional, no UV, no harmful ... enjoy fluorescence coloru by Reef, fish etc. Fantastic Dream feetctiveness. Fresh water adpots blue, red led to supply the spectrum requrired by ... hours . 4. We suggest White & Blue, 1:1 for seawate, Fresh water adpots blue, red led to supply the spectrum requrired by ...