I bought 50lbs of live rock from a local lady that was getting out of the hobby. 100 bucks !! Couldn't turn it down. My question is when I got the rock I took it out of the containers she had it in and put in it the sink and scrubbed it with a toothbrush and tap water. I know !! Bad idea. Didn't know at the time though. Did I kill the rock doing this ? And now it's been in the tank about six weeks and the rock is completely white. I only have a cheap T8 two bulb shop light since I was originally going fish only. Well now I want corals and I ordered a 4 bulb T5 fixture from Coralife. Will this light bring the rock back to life ?