To learn more, visit the Rain Harvesting exhibit at the Water Conservation Garden in El Cajon. Funded by the Ecolife Foundation and Ace Rain Gutters, the easy-to-duplicate setup features a 205-gallon rain barrel connected to a downspout and gutters on the garden’s warehouse. Overflow is stored in a 1,100-gallon tank nearby. The Garden, on the campus of Cuyamaca College, is open daily from 9 a.m. to 4 p.m. More info is at www.thegarden.org.