UV quartz sleeve still clean after 10 months

[boumshaka]

Title say's it all... I'm wondering if it's normal. Does it mean anything about my chemistry? I went to clean it last day, after 10 months of ownership and the sleeve is as clean as day one. I can say that the light bulb as been working 24\7 because I could see the glow from the outtake.

Thanks

 

[eraser2001]

Hi
I have to clean my every 6 months, this is because I use kalk and this build a layer of it.

 

[theMeat]

If you have no air in there it stays clean. Definitely change the bulb every 10-12 months if running 24/7. Even though the bulb still makes light it looses the range of Kevlar uv needs

 

[Waters]

I have had to clean my three times in 5 years....stays pretty clean. Every tank is different, I wouldn't worry about it and just be thankful it is staying clean