If you have an Aqua Ultraviolet Classic series UV sterilizer, this is the exact replacement lamp you need. It's a 15-watt quartz UV bulb, part number A20015. Made in the United States by Aqua Ultraviolet, so you know it's the genuine part designed to fit and perform like the original. UV bulbs lose effectiveness over time (usually replace every 6-12 months depending on usage), so keeping a fresh one ensures your sterilizer is killing algae, bacteria, and parasites effectively. Installation is straightforward—just turn off and unplug the unit, swap the old bulb for this one (being careful not to touch the quartz glass with bare fingers), and you're set. Helps maintain clear, healthy water in ponds, aquariums, or water features. A small but crucial part of your filtration system. Always good to have a spare on hand so you're never without UV protection. Reliable, OEM quality. Keep your water clean and your fish happy!
