Aqua UV Advantage 2000+ UV Sterilizer - 15 Watt Chillers Air accumulation inside the U-tube

Air accumulation inside the U-tube can reduce flow or interrupt the siphon

Offer the ring only while the aquarium lighting is operating

refugium chamber

Can support cycling in new systems and bacterial growth in established aquariums

Sometimes it uses its tail to loosely anchor itself in place

Aqua UV Advantage 2000+ UV Sterilizer - 15 Watt Chillers Air accumulation inside the U-tubeAqua UV Advantage 2000+ UV Sterilizer 15 Watt Aqua UV Advantage 2000+ UV Sterilizer 15 Watt is a compact in line ultraviolet sterilizer with barb x barb plumbing for aquariums and small aquatic systems that need controlled UV treatment through tubing based filtration. Aqua UV Advantage 2000+ 15 Watt In Line UV Sterilizer for Filter Plumbing The Advantage 2000+ 15 Watt barb x barb unit is designed for aquarists who want an in line UV sterilizer rather