The Columbia River water feature opened one month ago as a handsome addition to The Waterfront Vancouver. The water feature, a mix of public art, geographical depiction and play area, was an instant hit with children looking for a cool spot to frolic on summer days. Despite the water feature’s popularity, blemishes started showing on the 12-foot tall, 16-foot wide granite and bronze monolith shortly after it opened on Aug. 9. Water splashing onto the back side of the stone structure at the feature’s east end, a structure called Headwaters, has left unsightly white deposits on a small portion of the polished black granite. Vancouver Parks and Recreation Director Julie Hannon said the city’s janitorial subcontractor will try different cleaning products recommended by the fountain’s manufacturer, starting with commercially available, low-abrasion products. “It’s nothing heavy duty,” she said. “That will give us a good indication of how hard this will be to treat.” As part of this effort, the city last week changed the time when the water begins flowing through the structure, from 4:30 a.m. to 8:30 a.m., to allow more time for early-morning cleaning. The water will continue to be sh...