That would be Silca Sand you're after, you can get it from placemakers we paid $29 for a 25kg bag. As for cleaning it, like Imsmith said - but I find just using the siphon hose with out the vac tube easier just hold it slightly above the sand. Also you have to turn it over I do this once a week, sand gets toxin spots also alot of crap gets under the sand. Plants do grow in it - however cause you've got to turn the sand I find planting plants in pots easier as I can move them. HTH