I just got some liverock for the tank that I am setting up, but all I could afford was about 15 to 20 lbs from a denton aquarium store that was having a going out of business sale. I was thinking of adding more rock as my little buddy gets bigger. Is this acceptable? also as I was setting up a bucket and airstone with pump for storage of the live rock, like a stupid rookie I put the pump it's self in without realizing there was an airstone . needless to say. I took it out, and put and put the airstone in, but when I pluged the thing in ZAP. I got somewhat of a shock to the thumb that I was holding the plug in. my question is whether this could have killed the little critters living in the rock and thereby make the live rock not so live anymore. I can't remember if i was holding the pump or the ground with my other hand, but I think that the tubing on the airstone was made of rubber.