i have never had a problem with perlite and vermiculite.Have always used it .If u want a fool proof systm.i use it in pots then put the pot in a tray in about 1inch of water no more,then u have a plant that will last for upto a week without looking at it,fool proof.flood drain system u always checking ph ,pumps can fuck up,if it runs out of water u r fucked................This may not be the most profesional way but is easy,cheap and gets the results.tried and proven............