Yeah, it sent out so many lateral shoots I had to tear them up. The only thing more prolific has been the dwarf sag. I was able to trade some of it to my LFS for credit.
try sticking a root tab under it.
my wife has a bush of r. indica in her tank as well, with a flourite substrate, and it puts out as many shoots as mine, and has grown the full height of the tank, and is quite pink on the tops. very lush and pretty.