I started out on RC and found it to be really informative...I have met some awesome people on there, I found out about Canreef approx. 2 mos. later. I spend most of my time on Canreef because it is more 'local' oriented and it is Canadian. RC is still one of the premier sites for reefkeeping and works great as a reference guide or if I cant find the answer on Canreef