I am having a problem with the koi pond my son built 15 years ago on Earth Day. The water in the filtration barrel is going out ot the top of the barrel instead of through the uv stelizer and out to the pond! I can call for service but I like to figure it out for myself. Maybe the UV stelizer got clogged? I would appreciate any ideas you might suggest for me? I have beautiful plants and will post a photo soon! Thanks for having the great forum! Jackie