Mulching containers with marble chips?
I have some bromeliads in containers that keep getting blown over. Already they are in terra cotta pots that are already probably too big for them. I have some marble chips and am considering using them as a mulch to further weight the pots down.
My concern is that bromeliads tend to like slightly acidic soil and I don't want to alter it too much. Just how much do marble chips alter the ph of the medium?
It's already acidic, I would think; it's pine bark, peat, and perlite mixed together at about a 3-1-1 ratio.