in my life i have done so many experiment specially for catla but one time tested essence is my all time favorite and that is deer musk essence but i have never seen raw deer musk in my life, then the question is how did i used it. moreover in todays world specially in india musk is a banned item.
in homeopathy there is a medicine called tincture musk(Q) which is really contain musk recedue but 15 years back qyality you will not get anymore.
i tried so many verity of artificial musk essence and fish is also chief justice of supreme court so you can't make them fool. there is no substitute of real musk for catla. Hapco,swap,Honeyman company are the best according to my knowledge.
DON'T TURN DOWN THE FULL BOTTLE IN TO YOUTR BAIT IT CAN BE SPOIL YOUR BAIT.DOUGH LIKE PING PONG BALL USE 3 DROPS ONLY.
there is lots of medicine in homeopathy which is usefull in other carp specis but it works depend on the biological texture of the pond or lake.
thanking you all and with regards
an angler by heart.