I ran into a problem replacing the UV bulb in my sterilizer. Kaylen gave me tips on how to proceed and even sent me pictures to help me figure out what I should be doing. It turned out that the replacement bulb I ordered was just slightly bigger than it should have been even though it was the correct number for my filter. I managed to crack the crystal trying to make the bulb fit, but ThePondGuy replaced it! Most companies would have said it was my own fault.