Thank you Ross. Your weather sounds like we had in summer. And thanks about mentioning the mask. Have not been back to the selling lot where I gotthis from to investigate what their bulk lot is like, but will when the weather improves. Here it is wet, wet, wet. Now if I line a plastic washing basket with something open weave, fill it with pumice and turn the hose on it, that should do it quicker. And yes, it would go into the garden, wouldn't want to fill the rainwater drain with it. Ina On 3/07/2013 4:26 p.m., Jadeboy48@aol.com wrote: > To Ina, Pumice can be washed outside in a food strainer/collander and a lot > of the dust and fine pieces are washed away. I do it in my garden because > the pumice won't harm anything. Sometimes the sacks I get are really dusty > and you should not inhale little particles of rock! Please use a face mask > at the very least. I use at least 30 sacks of coarse pumice,sometimes more. > That is a lot of dust to inhale! Good luck-Russ H. in Peoria AZ,Current > 9:30pm temp is around 98F,20% humidity,variable winds,frequent dust > storms,very high fire danger. -- Ina Crossley Auckland New Zealand zone 10a