Our pool was complete last week, and we chose Ocen Blue pebble sheen. We have been faithfully brushing every day and there still seems to be a lot of excess plaster on the bottom of the pool, causing it too look like a more milky/aqua blue, even greenish. The sides and baja step are fine, oddly. Our PB said that we needed to just keep brushing, but it seems no amount of brushing is going to get rid of this. Has anyone else experienced this?