I'm a huge advocate of UV sterilizers for not only disinfecting but it keeps the water crystal clear as well. I had a submersible Pond Master for 3 years and only had to change the bulb once. I decided on a Jebao sterilizer this year due to the cheaper price and so far it's been very effective. Since using the Jebao which cannot be submerged, I do like having it more accessible rather than fishing it out of the pond. The only downside is it must be taken inside during the winter which isn't that much of a big deal for me.
Do you find UV sterilizers useful?
Do you find UV sterilizers useful?