Hi Dola,
Firstly what type of tackle are you using?
In the dam I would at least use 30lb braid minimum(I use 40lb).
Mono leader of 0.60mm / 0.80mm, attached to the braid via a power swivel.
I prefer using circle hooks as the barbel hook themselves. The size of the hook is dependent on the size of your bait. Fish heads I normally go with a 10/0 or 12/0 Mustad Demon or Z-Steel circle hooks (with the circle hooks, don't strike).
Your rod must have a reasonable back bone to set the hook once it has taken the bait and bully the barbel towards the side.
The reel must also have a good smooth drag as that come into play when the barbel gets close to the side. Your drag must not be to tight as they can snap your line when it suddenly turns for a final run..
Now when the barbel takes your bait, let it run, and give it some time to take the bait properly. With soft baits like chicken livers you can act on the first proper run, but with fish heads maybe only on the second or even third run. Then remember not to strike (when using circle hooks) as they hook themselves. Just lift your rod from the stand and start to tighten the drag. Once you feel proper resistance you can strike sideways once or twice to set the hook properly.
This generally works for me, but yes I have also lost fish through mainly being impatient...
My 2c..
Good luck next time.
