Can rockwool melt!?

[LOC NAR on probation]

Thats all I use and not melted any yet so I guess either PH is staying where it should or ...........

Your just very lucky. LOL. The mear thought of plants being slowy choked to death is distubing. Why on earth would a hydro guy that sells it tell someone that ?

What was he trying to sell you on to take it's place ?

LOC NAR on probation Reviewed by LOC NAR on probation on 02-20-2009. Can rockwool melt!? and no, not by fire :) Acidity. The hydro shop owner said if I have a PH of 5.5 or below, my 4-inch rockwell cubes will start melting and shrinking...constricting my plants...therefore...killing them. Any truth? Rating: 5