CNZ13-watt Germicidal UV-C Replacement Bulb, G23 Base (2-Pack)

bought as spars for my HVAC UV filter. Good deal

After failures with cheaper bulbs from another company, I was a bit nervous buying these. But they worked fine in my aquarium's UV sterilizer!

Purchased two for a backyard pond UV sterilizer. Clears up green water really well, and even if it only lasts one season, they’re well worth the cost. Consider how much is spent on other pond accessories!

Set of 2, first bulb did not work, second worked. Oh well not easy shipping light bulbs

These UV bulbs are very fragile and don't last more than about 7 or 8 months. They are all pretty much the same quality light but the price range can and does vary $10-$20 depending on the vendor you choose to buy them from. Amazon is the least expensive when you factor in the total cost of the light and shipping.

Pond cleared up in a day and has stayed that way. Great light for the price

Don't purchase from this company!!! I bought a CUF 6011 pump and UV unit from then in July of this year (2020) and it shorted out in October! This came with a written 1 year warranty. I called them (no one answers), wrote a letter to them with my purchase information through Amazon but they never responded. This product p/n is no longer on Amazon because it fails when put in service.I've responded to Amazon when they asked if I had any feedback I would like to give to the Seller, and I did, telling them of the defective product. Amazon also did nothing to intervene to their seller. They should remove Sellers that do not live up to their warranties!!!

It was what I ordered and it works well in water pump for fish pond. Algae cleared up quick.

El producto funciono y reemplazo al anterior muy bien

Not getting replacement bulb since last 2 years.Useless.