Loretta - I think we are just adjusting to your aversion to wirligig beetles. Most of us find them entertaining or at least of no concern. I personally do not like spiders, although I realize that they are beneficial. I think the insect and spider populations will drop naturally as the food chain develops. Using chemical controls may actually delay the establishment of critters that eat the insects and turn a short-term population boom into a longer term problem. One can manage and tweek a pond (or any other wildlife habitat), but attempting to control each species that one finds less than desirable with a quick fix will often lead to frustration. Think of the pond as a child that you can influence and help develop in a positive manner, but cannot control absolutly (without disastrous results).