I've found that it tends to take off a lot faster, but every tank is different.
On my personal tank it took off like crazy, it went from zero to full coverage in about 8-10 days and I had a box full of algae in 14 days, but my tank might be "conditioned" already...seen it before but can't explain it scientifically
See the recent vids on my YouTube channel, link is in the video description. You'll see what I mean....