Since saltwater aquariums involve the proximity of water and electricity, all integrated components (pumps, LED lighting, heaters) must hold UL, CE, or RoHS certifications. For the glass structure, look for compliance with ASTM C1036 (Standard Specification for Flat Glass). If the aquarium includes a metal stand, ensure it has a marine-grade powder coating or is made of 316 Stainless Steel to prevent corrosion from salt spray, which is a common cause of structural failure in coastal or high-humidity environments.