I'll try to go buy some new media tomorrow, we'll see what rocks I can find.
One more question: since I'll repot it in bloom, should I still cut off the dead roots? I ask that because everywhere I look it says I should be as gentle as possible with the roots when repotting in bloom, and just cutting them off doesn't seem that gentle... I also read somewhere that sometimes you should keep the dead roots, which would serve as a bit of organic media.