Floating bug attractor??

I have a pond that I put 15 goldfish in to manage mosquitoes and 3 years later I have dozens of fish and I’ve never fed them. I’m hoping to expand the pond capabilities by adding bluegill or other food fish.
In an effort to minimize effort and feed costs, I have an idea for a bug attractor, but wanted to see if anyone has done something like this before. My idea is a 5 gallon bucket with 1” holes drilled at the bottom. Flip the bucket over and put a pool noodle over the rim, or some other flotation devise. Somehow (haven’t figured this part out yet), put a floating crisco candle under the bucket.
The idea is the candle in the bucket would act as a floating carbon dioxide emitter and attract mosquitos. The mosquitos would hopefully lay more eggs in the pond and the fish eat the larvae.
Thoughts? Ideas to make it better?