I've been mixing the pumice with some potting mix. I thought that would offset any gaps. Anyway, I gave up the washing idea as it is far too time consuming. Thanks for that Dylan. Ina On 2/07/2013 5:38 p.m., Hannon wrote: > The fines are not harmful and can be very helpful in coating live roots and > root hairs. Washing pumice deprives roots of needed insulation and > moisture. For most plants there is such a thing as a medium that is too > coarse and aerated. > > Dylan > > * > > > * > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/ > -- Ina Crossley Auckland New Zealand zone 10a