Red Sea REEFER G2 Recommended for Gen 2 dual outlet (on either side of the overflow) models for the Red Sea Reefer 525 and above Waterbox Aquariums Waterbox aquarium with DN20 stock return nozzles ( check your aquariums specs here ) Plus, many other aquariums using the included Adapter – scroll down for full list Kit Includes: The Patented Random Flow Generator® Nozzle 3/4in Flex-Series Random Flow Generator® Nozzles – RFG075-FLX New Flex-Series Adapters – 2530-075 Multidapter™ – MHA2830LL075 Modular hose converter – 3035-075 Multidapter™ Genuine Loc-line Genuine 3/4in Loc-Line® fittings Includes the New Flex Series Random Flow Generator® Extremely Durable and Flexible Material Manufactured with a reef-safe TPU (Thermoplastic Polyurethane)