Reef On is an online retailer specializing in aquarium equipment and supplies, with a focus on products for reef and marine aquariums. Its catalog includes aquarium controllers, accessories, full systems, modules, and probes, alongside equipment for cooling and heating, lighting, pumps, plumbing, reactors, and skimmers. Shoppers can also browse tank parts, test equipment, cleaning tools, feeding tools, and aquarium additives, including calcium products.

The site features products such as the Neptune WAV Starter Kit, a compact powerhead described as delivering approximately 4,000 or more gallons per hour, and the Neptune PMK Par Monitoring Kit, designed for continuous measurement of aquarium light levels. Reef On provides online shopping features including customer accounts, order history, wish lists, gift vouchers, and a newsletter. The website also lists customer service resources, including contact information, returns, privacy information, and terms and conditions.

Customers can reach the retailer by phone at 801-563-0600. Its broad selection serves aquarium keepers seeking equipment and practical supplies for maintaining and monitoring their tanks