What I did was mixed up a solution of bleach (the dilution on the side of the bucket) and put the fake coral in it for a while (say 15 mins) and then scrubbed it. That was white coral. I then rinsed it very well, extremely well. I then let it dry, then rinsed very well again and let it dry. I then pu it in the tank.
Maybe a bit paranoid but didn't want any bleach in the water. I would not suggest this method for coral that is not white cause it may take out the colour.
Good luck man.
In desperate need of help, but very excited to learn. I have tasted the world of aquariums and now I'm hooked.
Here is what I have now...
maxijet 900 powerhead
100W (maybe 150W) heater, but heating isnt a prob
1.5 inches of crushed coral
some decoration stuff including a couple peices of old dried coral.) Not sure if it is real to be honest...
Crappy lights that I am going to rebuild, just for come flourescents