Hi all. I am running a fluvall 207 on my biocube mainly for biological filtration. Fluvall doesnt really give you enough media. I have a TON of old live rock in my basement sitting in a tub. I was thinking of breaking some down into rubble, for bio media. Question is, how do I clean it all before adding it. Im sure there are lots of dead matter within the rock. Would soaking the rubble in bleach work?