Nice going Owen !! You sure that u not the expert on carp fishing ??
Dirk, just a little extra to the info that Owen has so rightly given.. the catla only goes after sweet smelling baits and scented stuff. So you can think about using vanilla essence or honey with your bait.. The mrigal and rohu go for stronger and more pungent smelling bait so suggest you use hing mixed with your bait or some rotten cheese/bananas/jackfruit ( the smellier, the better)..
Catlas also tend to take their grandfather's time in eating the bait so you have to have infinite patience for these guys whereas the rohu/mrigal are fast buggers who hit-and-run. So you gotta be careful that u dont find your rod flying into the waters..
Another very good point raised by owen is that of ground-baiting. This has to be done a few days continuously prior to fishing in that spot... Its a tedious process but hey, NO PAIN, NO GAIN !!!
They be many guys here with loads of info and other stuff
and am sure they are willing to share it.. So go ahead, make their day !!