I swear I saw a UV system for a pond that could be used inside the pond,
rather than pump the water out then back in. But I cant find it anywhwere.

I need to replace my 40Watt Emperor Aquatics unit, but its rather larger and
hard to hide near my pond, so I was looking for something smaller.

The more I think about it, it seems a submersible UV was probably a dream I
had, but I figured I'd ask here.