Full Circle this is something you probably wouldn’t want but I have lots of frogs and I'm sure they also help with the bugs. When my fish died from the winter kill the tadpoles came on really strong. There were so many that the pond looked like it was raining. They would dive down and come to the top of the water making what looked like rain. I had no FA doing this time until the middle of June when they turned into frogs. I watched them closely and any algae that tried to form on the deck posts, deck latter and underwater structures were covered with tadpoles eating the faint algae I could see. The stems of my lilies that tried to form algae had tadpoles on them also.