The AquaClear Intake Stem is a replacement part for the AquaClear 30 and 50 Power Filters. The intake stem directs the flow of unfiltered water through filter inserts to trap particles, debris, and purify the water. The intake stem can be cleaned with a filter stem brush to remove any buildup of deposits. Regular filter maintenance should be performed every 3 months. The AquaClear 30 and 50 Power Filters feature a unique multi-stage filtration system that provides complete mechanical, chemical and biological filtration for superior water quality. AquaClear creates a wide variety of products for freshwater tanks such as fish tank accessories, fish tank decorations, and aquarium filter media that is perfect for large and small fish tanks.