The US has hundreds of thousands of stormwater ponds, and more are being constructed each year for both watershed protection and water conservation. The runoff entering stormwater ponds is typically about 25% as "strong" as raw sewage and can contain toxins. Most stormwater ponds do not have access to grid power and are perfectly suited to solar-powered circulators, which can provide a number of benefits including: 1) odor control, 2) improved oxidation of organic matter with a high biochemical oxygen demand (BOD), 3) improved water aesthetics, and 4) prevention of HABs, which would otherwise create even more HABs in downstream lakes and reservoirs.