I sat down to discuss an incredible niche business, J&D Lake Services - a pond cleaning company started by college students Declan & Joe. They literally went to Home Depot, bought a garden rake, and began scraping the bottoms of ponds for wealthy homeowners, "raking" in an incredible 75% net margin. Before their entry, pond cleaning companies relied on dumping chemicals, which would harm fish and plants. J&D Lake Services took a different approach: manually removing weeds. It’s ha...