API Pond & Waterfall Cleaner Deep Cleans on ContactAPI Pond and Waterfall Cleaner uses the power of active oxygen to deep clean pond surfaces, waterfalls, fountains, and birdbaths on contact. It is safe for all fish and aquatic plants and should be used as needed to maintain a clean, clear pond or outdoor water feature. Cleans pond surfaces Deep cleans waterfalls and decorative rocks Keeps fountain and birdbaths clean Safe for fish and aquatic plants INSTRUCTIONS: For ponds: keep pumps and aeration