That particular formula is for hydro.

Your soil pH down is in grandular form.

I dont see a problem with intermixing, but i dont grow hydro so i couldnt tell ya.
HARDDON Reviewed by HARDDON on . PH down... Hey, i need some ph down, this says... well i'l just let ya see it, http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=7710522420&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1 Question is, is that for soil ph as well as hydroponic? im confused when it comes to ph, temps, humids stuff like that. suggestions appreciated, cheers Rating: 5